diff --git a/core-java-modules/core-java-collections-maps-7/README.md b/core-java-modules/core-java-collections-maps-7/README.md
index c63f3b360b..2724df5695 100644
--- a/core-java-modules/core-java-collections-maps-7/README.md
+++ b/core-java-modules/core-java-collections-maps-7/README.md
@@ -1 +1,2 @@
-## Relevant Articles
\ No newline at end of file
+## Relevant Articles
+- [Difference Between putIfAbsent() and computeIfAbsent() in Java’s Map](https://www.baeldung.com/java-map-putifabsent-computeifabsent)