diff --git a/src/algorithms/tracking/adapters/glonass_l1_ca_dll_pll_tracking.cc b/src/algorithms/tracking/adapters/glonass_l1_ca_dll_pll_tracking.cc
index 6209f9299..965e0142d 100644
--- a/src/algorithms/tracking/adapters/glonass_l1_ca_dll_pll_tracking.cc
+++ b/src/algorithms/tracking/adapters/glonass_l1_ca_dll_pll_tracking.cc
@@ -1,3 +1,41 @@
+/*!
+ * \file glonass_l1_ca_dll_pll_tracking.cc
+ * \brief  Interface of an adapter of a DLL+PLL tracking loop block
+ * for Glonass L1 C/A to a TrackingInterface
+ * \author Gabriel Araujo, 2017. gabriel.araujo.5000(at)gmail.com
+ *         Luis Esteve, 2017. luis(at)epsilon-formacion.com
+ *
+ *
+ * Code DLL + carrier PLL according to the algorithms described in:
+ * K.Borre, D.M.Akos, N.Bertelsen, P.Rinder, and S.H.Jensen,
+ * A Software-Defined GPS and Galileo Receiver. A Single-Frequency
+ * Approach, Birkha user, 2007
+ *
+ * -------------------------------------------------------------------------
+ *
+ * Copyright (C) 2010-2017  (see AUTHORS file for a list of contributors)
+ *
+ * GNSS-SDR is a software defined Global Navigation
+ *          Satellite Systems receiver
+ *
+ * This file is part of GNSS-SDR.
+ *
+ * GNSS-SDR 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.
+ *
+ * GNSS-SDR 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GNSS-SDR. If not, see <http://www.gnu.org/licenses/>.
+ *
+ * -------------------------------------------------------------------------
+ */
+
 #include "glonass_l1_ca_dll_pll_tracking.h"
 #include <glog/logging.h>
 #include "Glonass_L1_CA.h"
@@ -108,4 +146,3 @@ gr::basic_block_sptr GlonassL1CaDllPllTracking::get_right_block()
 {
     return tracking_;
 }
-
diff --git a/src/algorithms/tracking/adapters/glonass_l1_ca_dll_pll_tracking.h b/src/algorithms/tracking/adapters/glonass_l1_ca_dll_pll_tracking.h
index b9d39cbef..192cb0853 100644
--- a/src/algorithms/tracking/adapters/glonass_l1_ca_dll_pll_tracking.h
+++ b/src/algorithms/tracking/adapters/glonass_l1_ca_dll_pll_tracking.h
@@ -1,3 +1,41 @@
+/*!
+ * \file glonass_l1_ca_dll_pll_tracking.h
+ * \brief  Interface of an adapter of a DLL+PLL tracking loop block
+ * for Glonass L1 C/A to a TrackingInterface
+ * \author Gabriel Araujo, 2017. gabriel.araujo.5000(at)gmail.com
+ *         Luis Esteve, 2017. luis(at)epsilon-formacion.com
+ *
+ *
+ * Code DLL + carrier PLL according to the algorithms described in:
+ * K.Borre, D.M.Akos, N.Bertelsen, P.Rinder, and S.H.Jensen,
+ * A Software-Defined GPS and Galileo Receiver. A Single-Frequency
+ * Approach, Birkha user, 2007
+ *
+ * -------------------------------------------------------------------------
+ *
+ * Copyright (C) 2010-2017  (see AUTHORS file for a list of contributors)
+ *
+ * GNSS-SDR is a software defined Global Navigation
+ *          Satellite Systems receiver
+ *
+ * This file is part of GNSS-SDR.
+ *
+ * GNSS-SDR 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.
+ *
+ * GNSS-SDR 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GNSS-SDR. If not, see <http://www.gnu.org/licenses/>.
+ *
+ * -------------------------------------------------------------------------
+ */
+
 #ifndef GNSS_SDR_GLONASS_L1_CA_DLL_PLL_TRACKING_H_
 #define GNSS_SDR_GLONASS_L1_CA_DLL_PLL_TRACKING_H_