diff --git a/reactor-core/README.md b/reactor-core/README.md
index 08dac354ab..21ccc1ed92 100644
--- a/reactor-core/README.md
+++ b/reactor-core/README.md
@@ -9,3 +9,4 @@ This module contains articles about Reactor Core.
 - [Programmatically Creating Sequences with Project Reactor](https://www.baeldung.com/flux-sequences-reactor)
 - [How to Extract a Mono’s Content in Java](https://www.baeldung.com/java-string-from-mono)
 - [How to Convert Mono<List<T\>> Into Flux<T\>](https://www.baeldung.com/java-mono-list-to-flux)
+- [Project Reactor: map() vs flatMap()](https://www.baeldung.com/java-reactor-map-flatmap)