diff --git a/shell_scripts/most_used_commands b/shell_scripts/most_used_commands
index b26b873..e50df82 100755
--- a/shell_scripts/most_used_commands
+++ b/shell_scripts/most_used_commands
@@ -7,7 +7,9 @@ AVOID="con\|utopiah@benetou.fr"
 #		~/.vimperator/info/default/history-command (specific JSON format)
 #		~/.newsbeuter/history.cmdline
 #		code repository per programming language (PHP, Processing, JavaScript, ... and bash too!)
-#			thought about this earlier to compare with the "signature" vocabulary of expert, notes unfound	
+#			http://fabien.benetou.fr/Tools/Mercurial#PotentialExtensions
+#			http://fabien.benetou.fr/Cookbook/Cognition#LearningNewLanguage
+#	see also logs_own_vocabulary
 
 echo consider also http://fabien.benetou.fr/Tools/ and to do exercises
 # warning, do not miss the environment e.g. http://mywiki.wooledge.org/BashGuide/