From 9dfe34e5fffb0b217295604caba64401a760cdcf Mon Sep 17 00:00:00 2001
From: Brett Calcott <brett.calcott@gmail.com>
Date: Sat, 17 Jun 2017 17:49:37 +1200
Subject: [PATCH] Update README.rst

---
 README.rst | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/README.rst b/README.rst
index 5cf4f22..3945398 100644
--- a/README.rst
+++ b/README.rst
@@ -3,7 +3,9 @@ The Waddington Box
 ==================
 
 A Waddington box is a simulated mechanical version of Waddington's landscape
-metaphor.
+metaphor. The model is used in the publication `Causal Specificity and the Instructive-Permissive Distinction`__.
+
+__ https://link.springer.com/article/10.1007/s10539-017-9568-0
 
 .. figure:: balls.png
     :width: 200px