diff --git a/apache-tomcat/sso/README.md b/apache-tomcat/sso/README.md
index 2b515178e0..7fe194b2f8 100644
--- a/apache-tomcat/sso/README.md
+++ b/apache-tomcat/sso/README.md
@@ -1,5 +1,7 @@
 ### Related articles
 
+- [SSO with Apache Tomcat](https://www.baeldung.com/apache-tomcat-sso)
+
 ### Launch Example using Docker
 
-$ docker-compose up
\ No newline at end of file
+$ docker-compose up