--- a/LINKS	Mon Mar 12 12:11:50 2018 +0000
+++ b/LINKS	Tue May 15 01:14:07 2018 +0100
@@ -5,7 +5,10 @@
 http://queue.acm.org/detail.cfm?id=2038036
 
 =============
+some examples
+https://wibisono.github.io/fp-oops/docs/redbook/monoid.html
 
+=============
 
 BufferOverflow
 http://seclists.org/oss-sec/2017/q2/344