--- a/LINKS	Fri Jun 22 13:34:05 2018 +0100
+++ b/LINKS	Tue Jun 26 01:49:32 2018 +0100
@@ -116,4 +116,18 @@
 ---------------------
 Scala resources
 
-https://danielwestheide.com/scala/neophytes.html
\ No newline at end of file
+https://danielwestheide.com/scala/neophytes.html
+
+
+
+
+
+
+
+functional programming
+----------------------
+Functional Data Structures
+https://cs.uwaterloo.ca/~plragde/flaneries/FDS/index.html
+
+Okasaki
+http://www.cs.cmu.edu/~rwh/theses/okasaki.pdf
\ No newline at end of file