--- a/handouts/ho01.tex	Mon Feb 22 22:09:31 2016 +0000
+++ b/handouts/ho01.tex	Tue Mar 22 17:09:24 2016 +0000
@@ -5,6 +5,9 @@
 \usepackage{../data}
 
 %%http://regexcrossword.com/challenges/cities/puzzles/1
+%%https://jex.im/regulex/
+%%https://www.reddit.com/r/ProgrammingLanguages/comments/42dlem/mona_compiler_development_part_2_parsing/
+%%https://www.reddit.com/r/ProgrammingLanguages/comments/43wlkq/formal_grammar_for_csh_tsch_sh_or_bash/
 
 \begin{document}
 \fnote{\copyright{} Christian Urban, 2014, 2015}