diff --git a/doc/tgi.sgml b/doc/tgi.sgml
index cf90fd198..0fef963f3 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/ and <tt/samples/mandelbrot.c/.
 </abstract>
 
 <!-- Begin the document -->