diff --git a/NonLinearEVP/NonLinearEVP_data.geo b/NonLinearEVP/NonLinearEVP_data.geo
index d6aabcc00a0b1cab49277aa0b7aad2b1ccfcbf7a..ea5e2cf0e38e665a31cea22d3c660763c28bf658 100644
--- a/NonLinearEVP/NonLinearEVP_data.geo
+++ b/NonLinearEVP/NonLinearEVP_data.geo
@@ -1,13 +1,19 @@
-///////////////////////////////////
-//// Author : Guillaume Demesy ////
-////   _data.geo               ////
-///////////////////////////////////
-
-// nm       = 1.;
-// epsilon0 = 8.854187817e-3*nm;
-// mu0      = 400.*Pi*nm;
-// cel      = 1.0/(Sqrt[epsilon0 * mu0]);
-// deg2rad  = Pi/180;
+// Copyright (C) 2018 Guillaume Demésy
+//
+// This file is part of the model NonLinearEVP.pro.
+// 
+// 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.
+// 
+// You should have received a copy of the GNU General Public License
+// along with This program. If not, see <https://www.gnu.org/licenses/>.
 
 pp0        = "1Geometry/0";
 pp1        = "2Polarization-Bloch/0";