diff --git a/Doc/lib/libdifflib.tex b/Doc/lib/libdifflib.tex
index 2993693..fc588ff 100644
--- a/Doc/lib/libdifflib.tex
+++ b/Doc/lib/libdifflib.tex
@@ -234,7 +234,8 @@
 
 
 \begin{seealso}
-  \seetitle{Pattern Matching: The Gestalt Approach}{Discussion of a
+  \seetitle[http://www.ddj.com/documents/s=1103/ddj8807c/]
+           {Pattern Matching: The Gestalt Approach}{Discussion of a
             similar algorithm by John W. Ratcliff and D. E. Metzener.
             This was published in
             \citetitle[http://www.ddj.com/]{Dr. Dobb's Journal} in