diff --git a/docs/index.txt b/docs/index.txt
index 6ebd2e5c5c578b4dc2aee154bfcd2eded931515e..a1e490045abab983fb41b37f8da56b340f4255ca 100755
--- a/docs/index.txt
+++ b/docs/index.txt
@@ -259,6 +259,7 @@ References
 
 Articles and blog entries on testing with Mock:
 
+* `Checking multiple calls with mock and coping with mutable arguments <http://www.voidspace.org.uk/python/weblog/arch_d7_2010_11_20.shtml#e1197>`_
 * `Mocking unbound methods and properties <http://www.voidspace.org.uk/python/weblog/arch_d7_2010_11_20.shtml#e1196>`_
 * `Mocking patterns: chained calls, partial mocking and open as context manager <http://www.voidspace.org.uk/python/weblog/arch_d7_2010_10_02.shtml#e1188>`_
 * `Mock recipes <http://konryd.blogspot.com/2010/06/mock-recipies.html>`_