diff --git a/projects/Assignments/README.md b/projects/Assignments/README.md
index 7b1d689b7dc2db3fc1a3cfa9f83b432cdc7c111e..11f44fcced7a0350625c1a434702d0ea12d69312 100644
--- a/projects/Assignments/README.md
+++ b/projects/Assignments/README.md
@@ -25,3 +25,4 @@ You can now verify that your files are been shared by checking the website:
 
 * [Netbeans 8](http://www.netbeans.org) and [Using Git Support](https://netbeans.org/kb/docs/ide/git.html) with [tutorial video](https://netbeans.org/kb/docs/ide/github_nb_screencast.html)
 * [GitLab Flavored Markdown (GFM)](https://docs.gitlab.com/ee/user/markdown.html) and [Markdown Cheatsheet](https://github.com/adam-p/markdown-here/wiki/Markdown-Cheatsheet)
+* Wikipedia: UML [Sequence diagram](https://en.wikipedia.org/wiki/Sequence_diagram)