diff --git a/include/imu/factor/factor_imu_bias_static.h b/include/imu/factor/factor_imu_bias_static.h
index dd867343c160fbe2dee09e648ef16fd404f95a4b..bd90504fc28637e601e4a1e2a0131153cb5c6761 100644
--- a/include/imu/factor/factor_imu_bias_static.h
+++ b/include/imu/factor/factor_imu_bias_static.h
@@ -1,3 +1,24 @@
+//--------LICENSE_START--------
+//
+// Copyright (C) 2020,2021,2022 Institut de Robòtica i Informàtica Industrial, CSIC-UPC.
+// Authors: Joan Solà Ortega (jsola@iri.upc.edu)
+// All rights reserved.
+//
+// This file is part of WOLF
+// WOLF is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser 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 Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+//--------LICENSE_END--------
 #ifndef FACTOR_IMU_BIAS_STATIC_H_
 #define FACTOR_IMU_BIAS_STATIC_H_
 
diff --git a/include/imu/tree_manager/tree_manager_sliding_window_static_bias.h b/include/imu/tree_manager/tree_manager_sliding_window_static_bias.h
index b0bc26b82ddfd3f997b3f91dc65dc398b8aa54f7..a511a9778db0238f3d8f321d77bab7ea721d4cd7 100644
--- a/include/imu/tree_manager/tree_manager_sliding_window_static_bias.h
+++ b/include/imu/tree_manager/tree_manager_sliding_window_static_bias.h
@@ -1,3 +1,24 @@
+//--------LICENSE_START--------
+//
+// Copyright (C) 2020,2021,2022 Institut de Robòtica i Informàtica Industrial, CSIC-UPC.
+// Authors: Joan Solà Ortega (jsola@iri.upc.edu)
+// All rights reserved.
+//
+// This file is part of WOLF
+// WOLF is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser 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 Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+//--------LICENSE_END--------
 #ifndef INCLUDE_TREE_MANAGER_SLIDING_WINDOW_STATIC_BIAS_H_
 #define INCLUDE_TREE_MANAGER_SLIDING_WINDOW_STATIC_BIAS_H_
 
diff --git a/src/tree_manager/tree_manager_sliding_window_static_bias.cpp b/src/tree_manager/tree_manager_sliding_window_static_bias.cpp
index 75ebe1940200b426f62fd054993dd21d9be160de..5a24bb656c30478c60567e9f204208893acfbd81 100644
--- a/src/tree_manager/tree_manager_sliding_window_static_bias.cpp
+++ b/src/tree_manager/tree_manager_sliding_window_static_bias.cpp
@@ -1,3 +1,24 @@
+//--------LICENSE_START--------
+//
+// Copyright (C) 2020,2021,2022 Institut de Robòtica i Informàtica Industrial, CSIC-UPC.
+// Authors: Joan Solà Ortega (jsola@iri.upc.edu)
+// All rights reserved.
+//
+// This file is part of WOLF
+// WOLF is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser 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 Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+//--------LICENSE_END--------
 #include "imu/tree_manager/tree_manager_sliding_window_static_bias.h"
 #include "imu/sensor/sensor_imu.h"
 
diff --git a/test/gtest_factor_imu_bias_static.cpp b/test/gtest_factor_imu_bias_static.cpp
index d9bfce8ec3ede4e955864736ec7e2645bcbf834d..e6fcf726ae6971a2124f0f096512464e4224f527 100644
--- a/test/gtest_factor_imu_bias_static.cpp
+++ b/test/gtest_factor_imu_bias_static.cpp
@@ -1,3 +1,24 @@
+//--------LICENSE_START--------
+//
+// Copyright (C) 2020,2021,2022 Institut de Robòtica i Informàtica Industrial, CSIC-UPC.
+// Authors: Joan Solà Ortega (jsola@iri.upc.edu)
+// All rights reserved.
+//
+// This file is part of WOLF
+// WOLF is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser 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 Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+//--------LICENSE_END--------
 #include <core/ceres_wrapper/solver_ceres.h>
 #include <core/utils/utils_gtest.h>
 #include <core/utils/logging.h>