diff --git a/modules/mol/alg/pymod/qsscoring.py b/modules/mol/alg/pymod/qsscoring.py
index 937c40910ec1a57d8c4301e47ede0f6aedb815e6..919b5a72f114b5a10f1b1fef7737267b14ab412f 100644
--- a/modules/mol/alg/pymod/qsscoring.py
+++ b/modules/mol/alg/pymod/qsscoring.py
@@ -1,5 +1,6 @@
 """
-Scoring of quaternary structures as in Martino's 2017 paper.
+Scoring of quaternary structures (QS). The QS scoring is according to the paper
+by `Bertoni et al. <https://dx.doi.org/10.1038/s41598-017-09654-8>`_.
 
 .. note ::