diff -r a730a5a0bab9 -r 89e6605c4ca4 TODO
--- a/TODO	Tue Jul 23 21:21:49 2019 +0100
+++ b/TODO	Mon Jul 29 09:37:20 2019 +0100
@@ -5,7 +5,10 @@
 
 Regular Path Queries & regular expressions
 
+------
+Russ Cox
 
+   https://swtch.com/~rsc/regexp/regexp1.html
 ------
 about extended regular expressions
   http://www.ddfy.de/