diff --git a/spring-security-custom-permission/README.MD b/spring-security-custom-permission/README.MD
index 5ac974203b..760cf41c63 100644
--- a/spring-security-custom-permission/README.MD
+++ b/spring-security-custom-permission/README.MD
@@ -1,2 +1,5 @@
 ###The Course
 The "REST With Spring" Classes: http://github.learnspringsecurity.com
+
+###Relevant Articles:
+- [A Custom Security Expression with Spring Security](http://www.baeldung.com/spring-security-create-new-custom-security-expression)