diff --git a/core-java-modules/core-java-lang-oop-patterns/README.md b/core-java-modules/core-java-lang-oop-patterns/README.md
index df68a1413a..ea3309dc0a 100644
--- a/core-java-modules/core-java-lang-oop-patterns/README.md
+++ b/core-java-modules/core-java-lang-oop-patterns/README.md
@@ -8,3 +8,4 @@ This module contains articles about Object-oriented programming (OOP) patterns i
 - [Immutable Objects in Java](https://www.baeldung.com/java-immutable-object)
 - [How to Make a Deep Copy of an Object in Java](https://www.baeldung.com/java-deep-copy)
 - [Using an Interface vs. Abstract Class in Java](https://www.baeldung.com/java-interface-vs-abstract-class)
+- [Should We Create an Interface for Only One Implementation?](https://www.baeldung.com/java-interface-single-implementation)