diff --git a/CONTRIBUTORS.txt b/CONTRIBUTORS.txt
index 2d581f9b00..1a07945443 100644
--- a/CONTRIBUTORS.txt
+++ b/CONTRIBUTORS.txt
@@ -7,3 +7,4 @@ Ana GONZALEZ-NICOLAS
 Daniel CAVIEDES-VOULLIÈME
 Olga DOMBROWSKI
 Yorck EWERDWALBESLOH
+Fernand ELOUNDOU
diff --git a/docs/users_guide/introduction/perturbation.md b/docs/users_guide/introduction/perturbation.md
index 9fd8ec73b5..1772c2fcf8 100644
--- a/docs/users_guide/introduction/perturbation.md
+++ b/docs/users_guide/introduction/perturbation.md
@@ -2,9 +2,12 @@
 
 This section describes **perturbation capabilities for eCLM-PDAF**.
 
-The implementation of the perturbation routines was first introduced
-by Yorck Ewerdwalbesloh in
-https://gitlab.jsc.fz-juelich.de/detect/cluster-c/c01/perturbationroutineclm5.
+The implementation of the Soil Hydraulic Parameter perturbation was
+first introduced by Fernand Eloundou and adapted by Yorck
+Ewerdwalbesloh.
+
+The implementation of the atmospheric forcing perturbation routines
+was first introduced by Yorck Ewerdwalbesloh.
 
 ## Description