diff --git a/core-kotlin-modules/core-kotlin-collections/README.md b/core-kotlin-modules/core-kotlin-collections/README.md
index f0da2b4cfd..66f15e7419 100644
--- a/core-kotlin-modules/core-kotlin-collections/README.md
+++ b/core-kotlin-modules/core-kotlin-collections/README.md
@@ -9,3 +9,4 @@ This module contains articles about core Kotlin collections.
 - [Converting a List to Map in Kotlin](https://www.baeldung.com/kotlin-list-to-map)
 - [Filtering Kotlin Collections](https://www.baeldung.com/kotlin-filter-collection)
 - [Collection Transformations in Kotlin](https://www.baeldung.com/kotlin-collection-transformations)
+- [Difference between fold and reduce in Kotlin](https://www.baeldung.com/kotlin/fold-vs-reduce)