diff --git a/DiffractionGratings/README.txt b/DiffractionGratings/README.txt
index da6d32f0bd66f73811ecb815bbd48e6a6a942081..4f357571d04221d7d54845651e0d871ff3acbfbe 100644
--- a/DiffractionGratings/README.txt
+++ b/DiffractionGratings/README.txt
@@ -1,3 +1,5 @@
 Parametric model of diffraction gratings
 
+A documentation is available [here](https://arxiv.org/abs/1710.11451)
+
 Models developed by Guillaume Demésy.