diff --git a/core-java-modules/core-java-lang-3/README.md b/core-java-modules/core-java-lang-3/README.md
index f496b74bfb..d735937a02 100644
--- a/core-java-modules/core-java-lang-3/README.md
+++ b/core-java-modules/core-java-lang-3/README.md
@@ -2,4 +2,5 @@
 
 This module contains articles about core features in the Java language
 
+- [Class.isInstance vs Class.isAssignableFrom](https://www.baeldung.com/java-isinstance-isassignablefrom)
 - [[<-- Prev]](/core-java-modules/core-java-lang-2)