diff --git a/doc/tgi.sgml b/doc/tgi.sgml
index cf90fd198..d20df40d1 100644
--- a/doc/tgi.sgml
+++ b/doc/tgi.sgml
@@ -9,7 +9,8 @@
 
 <abstract>
 The cc65 library provides functions for platform independent graphics.
-Include the tgi.h header file to get the necessary definitions.
+Include the tgi.h header file to get the necessary definitions, see also
+<tt>samples/tgidemo.c</tt> and <tt>samples/mandelbrot.c</tt>.
 </abstract>
 
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