diff --git a/core-java-modules/core-java-lang-4/README.md b/core-java-modules/core-java-lang-4/README.md
index a145633d2b..befef0b6eb 100644
--- a/core-java-modules/core-java-lang-4/README.md
+++ b/core-java-modules/core-java-lang-4/README.md
@@ -11,3 +11,4 @@ This module contains articles about core features in the Java language
 - [Fixing the “Declared package does not match the expected package” Error](https://www.baeldung.com/java-declared-expected-package-error)
 - [Chaining Constructors in Java](https://www.baeldung.com/java-chain-constructors)
 - [Difference Between POJO, JavaBeans, DTO and VO](https://www.baeldung.com/java-pojo-javabeans-dto-vo)
+- [Implements vs. Extends in Java](https://www.baeldung.com/java-implements-vs-extends)