diff --git a/README.md b/README.md
index ab1a3d1..8c87722 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,8 @@
 # multired
 Algorithm for structural reduction of multi-layer networks
+
+Please cite:
+
+M. De Domenico. V. Nicosia, A. Arenas, V. Latora
+"Structural reducibility of multilayer networks", 
+Nat. Commun. 7864 (2015) doi:10.1038/ncomms7864