diff --git a/README.md b/README.md
index ed4ed1a..586409b 100644
--- a/README.md
+++ b/README.md
@@ -55,3 +55,12 @@ Contributing
 4. Push to the branch (`git push origin my-new-feature`)
 5. Create a new Pull Request
 
+
+References
+----------
+
+* Version naming
+  * https://www.countries-ofthe-world.com/world-currencies.html
+  *  Rushing Roubles
+
+