Added reference to the Expat home page.
diff --git a/Doc/lib/libpyexpat.tex b/Doc/lib/libpyexpat.tex
index 356e4b7..46cf880 100644
--- a/Doc/lib/libpyexpat.tex
+++ b/Doc/lib/libpyexpat.tex
@@ -99,6 +99,12 @@
 \end{funcdesc}
 
 
+\begin{seealso}
+  \seetitle[http://www.libexpat.org/]{The Expat XML Parser}
+           {Home page of the Expat project.}
+\end{seealso}
+
+
 \subsection{XMLParser Objects \label{xmlparser-objects}}
 
 \class{xmlparser} objects have the following methods: