diff --git a/samples/python/camshift.py b/samples/python/camshift.py
index 101da85b31fa5ee036cea0ed4545054a52d0d614..0fcab728c510af1add9a84d1b1b2f9664849d682 100755
--- a/samples/python/camshift.py
+++ b/samples/python/camshift.py
@@ -8,7 +8,7 @@ This is a demo that shows mean-shift based tracking
 You select a color objects such as your face and it tracks it.
 This reads from video camera (0 by default, or the camera number the user enters)
 
-http://www.robinhewitt.com/research/track/camshift.html
+[1] http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.14.7673
 
 Usage:
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