diff --git a/core-java-modules/core-java-string-conversions-3/README.md b/core-java-modules/core-java-string-conversions-3/README.md
index 96799d1660..4b348dd555 100644
--- a/core-java-modules/core-java-string-conversions-3/README.md
+++ b/core-java-modules/core-java-string-conversions-3/README.md
@@ -1,3 +1,4 @@
 ## Relevant Articles
 - [Object.toString() vs String.valueOf()](https://www.baeldung.com/java-object-tostring-vs-string-valueof)
 - [Convert String to Int Using Encapsulation](https://www.baeldung.com/java-encapsulation-convert-string-to-int)
+- [HashMap with Multiple Values for the Same Key](https://www.baeldung.com/java-hashmap-multiple-values-per-key)