diff --git a/doc/bib.bib b/doc/bib.bib
index bb3a3ac..1712526 100644
--- a/doc/bib.bib
+++ b/doc/bib.bib
@@ -81,3 +81,12 @@
 	Year=2006
 	}
 
+@Misc{Shoe06,
+	Title="{UML} Diagrams Using {G}raphviz {D}ot",
+	Month=apr,
+	Year=2006,
+	URL="http://www.ffnn.nl/pages/articles/media/uml-diagrams-using-graphviz-dot.php",
+	Note="Available online \url{http://www.ffnn.nl/pages/articles/media/uml-diagrams-using-graphviz-dot.php}",
+	Author="Frank Schoep"
+}
+