diff --git a/src/cluster/cluster.cpp b/src/cluster/cluster.cpp
index 5e1d120c7c635988ad84ba432c977237b4c60247..9b64ab4895d1b5da3959d89eb3e07c9f824c0225 100644
--- a/src/cluster/cluster.cpp
+++ b/src/cluster/cluster.cpp
@@ -1,17 +1,18 @@
-/* Copyright 2024 INAF - Osservatorio Astronomico di Cagliari
+/* Copyright (C) 2024   INAF - Osservatorio Astronomico di Cagliari
 
-   Licensed under the Apache License, Version 2.0 (the "License");
-   you may not use this file except in compliance with the License.
-   You may obtain a copy of the License at
-
-   http://www.apache.org/licenses/LICENSE-2.0
-
-   Unless required by applicable law or agreed to in writing, software
-   distributed under the License is distributed on an "AS IS" BASIS,
-   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-   See the License for the specific language governing permissions and
-   limitations under the License.
-*/
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+   
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+   
+   A copy of the GNU General Public License is distributed along with
+   this program in the COPYING file. If not, see: <https://www.gnu.org/licenses/>.
+ */
 
 /*! \file cluster.cpp
  *
diff --git a/src/cluster/np_cluster.cpp b/src/cluster/np_cluster.cpp
index 8b3dab779a1a32b92a1047c0555452af49a6d2a7..a6cfc15cbb5f1492af2a4f18cf738f5795fe937f 100644
--- a/src/cluster/np_cluster.cpp
+++ b/src/cluster/np_cluster.cpp
@@ -1,16 +1,17 @@
-/* Copyright 2024 INAF - Osservatorio Astronomico di Cagliari
+/* Copyright (C) 2024   INAF - Osservatorio Astronomico di Cagliari
 
-   Licensed under the Apache License, Version 2.0 (the "License");
-   you may not use this file except in compliance with the License.
-   You may obtain a copy of the License at
-
-       http://www.apache.org/licenses/LICENSE-2.0
-
-   Unless required by applicable law or agreed to in writing, software
-   distributed under the License is distributed on an "AS IS" BASIS,
-   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-   See the License for the specific language governing permissions and
-   limitations under the License.
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+   
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+   
+   A copy of the GNU General Public License is distributed along with
+   this program in the COPYING file. If not, see: <https://www.gnu.org/licenses/>.
  */
 
 /*! \file np_cluster.cpp
diff --git a/src/libnptm/Commons.cpp b/src/libnptm/Commons.cpp
index 1410bbea6305e166786d05c0fb7b5f68df753812..2e56afd97c89368f47e545a581dc909a8ecaebb8 100644
--- a/src/libnptm/Commons.cpp
+++ b/src/libnptm/Commons.cpp
@@ -1,16 +1,17 @@
-/* Copyright 2024 INAF - Osservatorio Astronomico di Cagliari
+/* Copyright (C) 2024   INAF - Osservatorio Astronomico di Cagliari
 
-   Licensed under the Apache License, Version 2.0 (the "License");
-   you may not use this file except in compliance with the License.
-   You may obtain a copy of the License at
-
-       http://www.apache.org/licenses/LICENSE-2.0
-
-   Unless required by applicable law or agreed to in writing, software
-   distributed under the License is distributed on an "AS IS" BASIS,
-   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-   See the License for the specific language governing permissions and
-   limitations under the License.
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+   
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+   
+   A copy of the GNU General Public License is distributed along with
+   this program in the COPYING file. If not, see: <https://www.gnu.org/licenses/>.
  */
 
 /*! \file Commons.cpp
diff --git a/src/libnptm/Configuration.cpp b/src/libnptm/Configuration.cpp
index 3aaa1bb425cd31b01583dccaf50a196d0cc544fb..0ed4ed745f7df55d13005138e4b9caff35b46f82 100644
--- a/src/libnptm/Configuration.cpp
+++ b/src/libnptm/Configuration.cpp
@@ -1,16 +1,17 @@
-/* Copyright 2024 INAF - Osservatorio Astronomico di Cagliari
+/* Copyright (C) 2024   INAF - Osservatorio Astronomico di Cagliari
 
-   Licensed under the Apache License, Version 2.0 (the "License");
-   you may not use this file except in compliance with the License.
-   You may obtain a copy of the License at
-
-       http://www.apache.org/licenses/LICENSE-2.0
-
-   Unless required by applicable law or agreed to in writing, software
-   distributed under the License is distributed on an "AS IS" BASIS,
-   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-   See the License for the specific language governing permissions and
-   limitations under the License.
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+   
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+   
+   A copy of the GNU General Public License is distributed along with
+   this program in the COPYING file. If not, see: <https://www.gnu.org/licenses/>.
  */
 
 /*! \file Configuration.cpp
diff --git a/src/libnptm/TransitionMatrix.cpp b/src/libnptm/TransitionMatrix.cpp
index 12d0671dcb4defd0db86f1bdf5314d35be4d57b9..8c72f899998f3860167977661587f776ab365db2 100644
--- a/src/libnptm/TransitionMatrix.cpp
+++ b/src/libnptm/TransitionMatrix.cpp
@@ -1,16 +1,17 @@
-/* Copyright 2024 INAF - Osservatorio Astronomico di Cagliari
+/* Copyright (C) 2024   INAF - Osservatorio Astronomico di Cagliari
 
-   Licensed under the Apache License, Version 2.0 (the "License");
-   you may not use this file except in compliance with the License.
-   You may obtain a copy of the License at
-
-       http://www.apache.org/licenses/LICENSE-2.0
-
-   Unless required by applicable law or agreed to in writing, software
-   distributed under the License is distributed on an "AS IS" BASIS,
-   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-   See the License for the specific language governing permissions and
-   limitations under the License.
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+   
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+   
+   A copy of the GNU General Public License is distributed along with
+   this program in the COPYING file. If not, see: <https://www.gnu.org/licenses/>.
  */
 
 /*! \file TransitionMatrix.cpp
diff --git a/src/libnptm/algebraic.cpp b/src/libnptm/algebraic.cpp
index 53b7dec9d6904e01de8c600c725e0ea3c90475ba..c942a1fdd3a4f242fd409a6390975da344d93cee 100644
--- a/src/libnptm/algebraic.cpp
+++ b/src/libnptm/algebraic.cpp
@@ -1,16 +1,17 @@
-/* Copyright 2024 INAF - Osservatorio Astronomico di Cagliari
-
-   Licensed under the Apache License, Version 2.0 (the "License");
-   you may not use this file except in compliance with the License.
-   You may obtain a copy of the License at
-
-       http://www.apache.org/licenses/LICENSE-2.0
-
-   Unless required by applicable law or agreed to in writing, software
-   distributed under the License is distributed on an "AS IS" BASIS,
-   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-   See the License for the specific language governing permissions and
-   limitations under the License.
+/* Copyright (C) 2024   INAF - Osservatorio Astronomico di Cagliari
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+   
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+   
+   A copy of the GNU General Public License is distributed along with
+   this program in the COPYING file. If not, see: <https://www.gnu.org/licenses/>.
  */
 
 /*! \file algebraic.cpp
diff --git a/src/libnptm/clu_subs.cpp b/src/libnptm/clu_subs.cpp
index 5a7e3db5c1b79121277e112d3e3a25feb0fd7d52..5886908456d3793c3c7b7536f76c2dba1fecc893 100644
--- a/src/libnptm/clu_subs.cpp
+++ b/src/libnptm/clu_subs.cpp
@@ -1,16 +1,17 @@
-/* Copyright 2024 INAF - Osservatorio Astronomico di Cagliari
+/* Copyright (C) 2024   INAF - Osservatorio Astronomico di Cagliari
 
-   Licensed under the Apache License, Version 2.0 (the "License");
-   you may not use this file except in compliance with the License.
-   You may obtain a copy of the License at
-
-       http://www.apache.org/licenses/LICENSE-2.0
-
-   Unless required by applicable law or agreed to in writing, software
-   distributed under the License is distributed on an "AS IS" BASIS,
-   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-   See the License for the specific language governing permissions and
-   limitations under the License.
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+   
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+   
+   A copy of the GNU General Public License is distributed along with
+   this program in the COPYING file. If not, see: <https://www.gnu.org/licenses/>.
  */
 
 /*! \file clu_subs.cpp
diff --git a/src/libnptm/lapack_calls.cpp b/src/libnptm/lapack_calls.cpp
index a9e39cd549eabe9cb8c18ab85a89743b758bc867..c2127c54077bd2fb2739f450e4d72aa02785053c 100644
--- a/src/libnptm/lapack_calls.cpp
+++ b/src/libnptm/lapack_calls.cpp
@@ -1,16 +1,17 @@
-/* Copyright 2024 INAF - Osservatorio Astronomico di Cagliari
-
-   Licensed under the Apache License, Version 2.0 (the "License");
-   you may not use this file except in compliance with the License.
-   You may obtain a copy of the License at
-
-       http://www.apache.org/licenses/LICENSE-2.0
-
-   Unless required by applicable law or agreed to in writing, software
-   distributed under the License is distributed on an "AS IS" BASIS,
-   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-   See the License for the specific language governing permissions and
-   limitations under the License.
+/* Copyright (C) 2024   INAF - Osservatorio Astronomico di Cagliari
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+   
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+   
+   A copy of the GNU General Public License is distributed along with
+   this program in the COPYING file. If not, see: <https://www.gnu.org/licenses/>.
  */
 
 /*! \file lapack_calls.cpp
diff --git a/src/libnptm/logging.cpp b/src/libnptm/logging.cpp
index 2f7526e58f6da76787b3bf4a0d4789597f428d21..514eeaeed947f5012d2ac2d0948f67884522c7a5 100644
--- a/src/libnptm/logging.cpp
+++ b/src/libnptm/logging.cpp
@@ -1,16 +1,17 @@
-/* Copyright 2024 INAF - Osservatorio Astronomico di Cagliari
+/* Copyright (C) 2024   INAF - Osservatorio Astronomico di Cagliari
 
-   Licensed under the Apache License, Version 2.0 (the "License");
-   you may not use this file except in compliance with the License.
-   You may obtain a copy of the License at
-
-       http://www.apache.org/licenses/LICENSE-2.0
-
-   Unless required by applicable law or agreed to in writing, software
-   distributed under the License is distributed on an "AS IS" BASIS,
-   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-   See the License for the specific language governing permissions and
-   limitations under the License.
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+   
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+   
+   A copy of the GNU General Public License is distributed along with
+   this program in the COPYING file. If not, see: <https://www.gnu.org/licenses/>.
  */
 
 /*! \file logging.cpp
diff --git a/src/libnptm/magma_calls.cpp b/src/libnptm/magma_calls.cpp
index ab83103a4c0c5ddc469245291f6e6e6974e27b54..d9875d9bae54e25b974e337a2f11c3152fd410c4 100644
--- a/src/libnptm/magma_calls.cpp
+++ b/src/libnptm/magma_calls.cpp
@@ -1,16 +1,17 @@
-/* Copyright 2004 INAF - Osservatorio Astronomico di Cagliari
+/* Copyright (C) 2024   INAF - Osservatorio Astronomico di Cagliari
 
-   Licensed under the Apache License, Version 2.0 (the "License");
-   you may not use this file except in compliance with the License.
-   You may obtain a copy of the License at
-
-       http://www.apache.org/licenses/LICENSE-2.0
-
-   Unless required by applicable law or agreed to in writing, software
-   distributed under the License is distributed on an "AS IS" BASIS,
-   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-   See the License for the specific language governing permissions and
-   limitations under the License.
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+   
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+   
+   A copy of the GNU General Public License is distributed along with
+   this program in the COPYING file. If not, see: <https://www.gnu.org/licenses/>.
  */
 
 /*! \file magma_calls.cpp
diff --git a/src/libnptm/sph_subs.cpp b/src/libnptm/sph_subs.cpp
index 208f4bd3d4013c5a6ee44f811ab94164912be4d4..10abdb83d026339ecd4a59056d204f8ecefa7fbc 100644
--- a/src/libnptm/sph_subs.cpp
+++ b/src/libnptm/sph_subs.cpp
@@ -1,16 +1,17 @@
-/* Copyright 2024 INAF - Osservatorio Astronomico di Cagliari
+/* Copyright (C) 2024   INAF - Osservatorio Astronomico di Cagliari
 
-   Licensed under the Apache License, Version 2.0 (the "License");
-   you may not use this file except in compliance with the License.
-   You may obtain a copy of the License at
-
-       http://www.apache.org/licenses/LICENSE-2.0
-
-   Unless required by applicable law or agreed to in writing, software
-   distributed under the License is distributed on an "AS IS" BASIS,
-   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-   See the License for the specific language governing permissions and
-   limitations under the License.
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+   
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+   
+   A copy of the GNU General Public License is distributed along with
+   this program in the COPYING file. If not, see: <https://www.gnu.org/licenses/>.
  */
 
 /*! \file sph_subs.cpp
diff --git a/src/libnptm/tfrfme.cpp b/src/libnptm/tfrfme.cpp
index b0216522c549b4418caa1391c5f845b4953ec34b..df999983f83f4b1e855fa23b9990c2500998cf33 100644
--- a/src/libnptm/tfrfme.cpp
+++ b/src/libnptm/tfrfme.cpp
@@ -1,16 +1,17 @@
-/* Copyright 2024 INAF - Osservatorio Astronomico di Cagliari
+/* Copyright (C) 2024   INAF - Osservatorio Astronomico di Cagliari
 
-   Licensed under the Apache License, Version 2.0 (the "License");
-   you may not use this file except in compliance with the License.
-   You may obtain a copy of the License at
-
-       http://www.apache.org/licenses/LICENSE-2.0
-
-   Unless required by applicable law or agreed to in writing, software
-   distributed under the License is distributed on an "AS IS" BASIS,
-   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-   See the License for the specific language governing permissions and
-   limitations under the License.
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+   
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+   
+   A copy of the GNU General Public License is distributed along with
+   this program in the COPYING file. If not, see: <https://www.gnu.org/licenses/>.
  */
 
 /*! \file tfrfme.cpp
diff --git a/src/libnptm/tra_subs.cpp b/src/libnptm/tra_subs.cpp
index b952d467f68ffec75bbaaddbfa2df6a4ad2bd8db..27f1039f57044471540d2ab219a1db769ed2cc77 100644
--- a/src/libnptm/tra_subs.cpp
+++ b/src/libnptm/tra_subs.cpp
@@ -1,16 +1,17 @@
-/* Copyright 2024 INAF - Osservatorio Astronomico di Cagliari
+/* Copyright (C) 2024   INAF - Osservatorio Astronomico di Cagliari
 
-   Licensed under the Apache License, Version 2.0 (the "License");
-   you may not use this file except in compliance with the License.
-   You may obtain a copy of the License at
-
-       http://www.apache.org/licenses/LICENSE-2.0
-
-   Unless required by applicable law or agreed to in writing, software
-   distributed under the License is distributed on an "AS IS" BASIS,
-   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-   See the License for the specific language governing permissions and
-   limitations under the License.
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+   
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+   
+   A copy of the GNU General Public License is distributed along with
+   this program in the COPYING file. If not, see: <https://www.gnu.org/licenses/>.
  */
 
 /*! \file tra_subs.cpp
diff --git a/src/libnptm/types.cpp b/src/libnptm/types.cpp
index 2f17bc9627125eae563ffea7131f381ed5b80083..59f4fe4973f4d58c6e4bca33692e5090718e1c0d 100644
--- a/src/libnptm/types.cpp
+++ b/src/libnptm/types.cpp
@@ -1,16 +1,17 @@
-/* Copyright 2024 INAF - Osservatorio Astronomico di Cagliari
+/* Copyright (C) 2024   INAF - Osservatorio Astronomico di Cagliari
 
-   Licensed under the Apache License, Version 2.0 (the "License");
-   you may not use this file except in compliance with the License.
-   You may obtain a copy of the License at
-
-       http://www.apache.org/licenses/LICENSE-2.0
-
-   Unless required by applicable law or agreed to in writing, software
-   distributed under the License is distributed on an "AS IS" BASIS,
-   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-   See the License for the specific language governing permissions and
-   limitations under the License.
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+   
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+   
+   A copy of the GNU General Public License is distributed along with
+   this program in the COPYING file. If not, see: <https://www.gnu.org/licenses/>.
  */
 
 /*! \file types.cpp
diff --git a/src/sphere/np_sphere.cpp b/src/sphere/np_sphere.cpp
index 506931cce1a6411ed233b55b19777080682ffa49..8c369947763b15011ff243f00e57d39209064d78 100644
--- a/src/sphere/np_sphere.cpp
+++ b/src/sphere/np_sphere.cpp
@@ -1,16 +1,17 @@
-/* Copyright 2024 INAF - Osservatorio Astronomico di Cagliari
+/* Copyright (C) 2024   INAF - Osservatorio Astronomico di Cagliari
 
-   Licensed under the Apache License, Version 2.0 (the "License");
-   you may not use this file except in compliance with the License.
-   You may obtain a copy of the License at
-
-       http://www.apache.org/licenses/LICENSE-2.0
-
-   Unless required by applicable law or agreed to in writing, software
-   distributed under the License is distributed on an "AS IS" BASIS,
-   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-   See the License for the specific language governing permissions and
-   limitations under the License.
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+   
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+   
+   A copy of the GNU General Public License is distributed along with
+   this program in the COPYING file. If not, see: <https://www.gnu.org/licenses/>.
  */
 
 /*! \file np_sphere.cpp
diff --git a/src/sphere/sphere.cpp b/src/sphere/sphere.cpp
index c7f6b11f4bc0bb8691517fbcec75f763d46e0c07..020a176c873b610809c376f868212cd18dd1b1c4 100644
--- a/src/sphere/sphere.cpp
+++ b/src/sphere/sphere.cpp
@@ -1,16 +1,17 @@
-/* Copyright 2024 INAF - Osservatorio Astronomico di Cagliari
+/* Copyright (C) 2024   INAF - Osservatorio Astronomico di Cagliari
 
-   Licensed under the Apache License, Version 2.0 (the "License");
-   you may not use this file except in compliance with the License.
-   You may obtain a copy of the License at
-
-       http://www.apache.org/licenses/LICENSE-2.0
-
-   Unless required by applicable law or agreed to in writing, software
-   distributed under the License is distributed on an "AS IS" BASIS,
-   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-   See the License for the specific language governing permissions and
-   limitations under the License.
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+   
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+   
+   A copy of the GNU General Public License is distributed along with
+   this program in the COPYING file. If not, see: <https://www.gnu.org/licenses/>.
  */
 
 /*! \file sphere.cpp
diff --git a/src/testing/test_TEDF.cpp b/src/testing/test_TEDF.cpp
index 11ba3f55182380b867b4359c181feb15ca65dd6c..1b3632e886fc93240f2a5a0068d79fe6f4aa4b95 100644
--- a/src/testing/test_TEDF.cpp
+++ b/src/testing/test_TEDF.cpp
@@ -1,16 +1,17 @@
-/* Copyright 2024 INAF - Osservatorio Astronomico di Cagliari
+/* Copyright (C) 2024   INAF - Osservatorio Astronomico di Cagliari
 
-   Licensed under the Apache License, Version 2.0 (the "License");
-   you may not use this file except in compliance with the License.
-   You may obtain a copy of the License at
-
-       http://www.apache.org/licenses/LICENSE-2.0
-
-   Unless required by applicable law or agreed to in writing, software
-   distributed under the License is distributed on an "AS IS" BASIS,
-   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-   See the License for the specific language governing permissions and
-   limitations under the License.
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+   
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+   
+   A copy of the GNU General Public License is distributed along with
+   this program in the COPYING file. If not, see: <https://www.gnu.org/licenses/>.
  */
 
 //! \file test_TEDF.cpp
diff --git a/src/testing/test_TTMS.cpp b/src/testing/test_TTMS.cpp
index 1ed1615d9c069bdfaedca56647425cfda5da20f6..e662c2c708101481f1e93fb9e839ab9a16479f7e 100644
--- a/src/testing/test_TTMS.cpp
+++ b/src/testing/test_TTMS.cpp
@@ -1,16 +1,17 @@
-/* Copyright 2024 INAF - Osservatorio Astronomico di Cagliari
+/* Copyright (C) 2024   INAF - Osservatorio Astronomico di Cagliari
 
-   Licensed under the Apache License, Version 2.0 (the "License");
-   you may not use this file except in compliance with the License.
-   You may obtain a copy of the License at
-
-       http://www.apache.org/licenses/LICENSE-2.0
-
-   Unless required by applicable law or agreed to in writing, software
-   distributed under the License is distributed on an "AS IS" BASIS,
-   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-   See the License for the specific language governing permissions and
-   limitations under the License.
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+   
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+   
+   A copy of the GNU General Public License is distributed along with
+   this program in the COPYING file. If not, see: <https://www.gnu.org/licenses/>.
  */
 
 //! \file test_TTMS.cpp
diff --git a/src/trapping/cfrfme.cpp b/src/trapping/cfrfme.cpp
index d67d464dbce342fdaa0e8e22d0ee8a92b4a9f888..c00772293c5d9f9832168237329e8138b615a6fb 100644
--- a/src/trapping/cfrfme.cpp
+++ b/src/trapping/cfrfme.cpp
@@ -1,16 +1,17 @@
-/* Copyright 2024 INAF - Osservatorio Astronomico di Cagliari
+/* Copyright (C) 2024   INAF - Osservatorio Astronomico di Cagliari
 
-   Licensed under the Apache License, Version 2.0 (the "License");
-   you may not use this file except in compliance with the License.
-   You may obtain a copy of the License at
-
-       http://www.apache.org/licenses/LICENSE-2.0
-
-   Unless required by applicable law or agreed to in writing, software
-   distributed under the License is distributed on an "AS IS" BASIS,
-   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-   See the License for the specific language governing permissions and
-   limitations under the License.
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+   
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+   
+   A copy of the GNU General Public License is distributed along with
+   this program in the COPYING file. If not, see: <https://www.gnu.org/licenses/>.
  */
 
 /*! \file cfrfme.cpp
diff --git a/src/trapping/clffft.cpp b/src/trapping/clffft.cpp
index 0fe64aec2adf821c4d01520b7fd72b662ee0ae8a..b36383756520522b7ff8f7e10f7a65626b677150 100644
--- a/src/trapping/clffft.cpp
+++ b/src/trapping/clffft.cpp
@@ -1,16 +1,17 @@
-/* Copyright 2024 INAF - Osservatorio Astronomico di Cagliari
+/* Copyright (C) 2024   INAF - Osservatorio Astronomico di Cagliari
 
-   Licensed under the Apache License, Version 2.0 (the "License");
-   you may not use this file except in compliance with the License.
-   You may obtain a copy of the License at
-
-       http://www.apache.org/licenses/LICENSE-2.0
-
-   Unless required by applicable law or agreed to in writing, software
-   distributed under the License is distributed on an "AS IS" BASIS,
-   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-   See the License for the specific language governing permissions and
-   limitations under the License.
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+   
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+   
+   A copy of the GNU General Public License is distributed along with
+   this program in the COPYING file. If not, see: <https://www.gnu.org/licenses/>.
  */
 
 /*! \file clffft.cpp