--- a/handouts/ho03.tex	Tue Oct 15 00:28:51 2013 +0200
+++ b/handouts/ho03.tex	Tue Oct 15 22:14:04 2013 +0100
@@ -375,7 +375,8 @@
 \end{tikzpicture}
 \end{center}
 
-
+\noindent
+This construction of a NFA from a regular expression was invented by Ken Thompson in 1968.
 
 \end{document}