--- a/handouts/ho05.tex	Thu Dec 07 12:26:41 2017 +0000
+++ b/handouts/ho05.tex	Mon Jan 01 15:02:03 2018 +0000
@@ -3,6 +3,9 @@
 \usepackage{../langs}
 \usepackage{../grammar}
 
+% epsilon and left-recursion elimination
+% http://www.mollypages.org/page/grammar/index.mp
+
 \begin{document}
 
 \section*{Handout 5 (Grammars \& Parser)}