diff --git a/rxjava-modules/rxjava-core/README.md b/rxjava-modules/rxjava-core/README.md
index 16625435e6..a3c8cef4e7 100644
--- a/rxjava-modules/rxjava-core/README.md
+++ b/rxjava-modules/rxjava-core/README.md
@@ -14,3 +14,4 @@ This module contains articles about RxJava.
 - [Combining RxJava Completables](https://www.baeldung.com/rxjava-completable)
 - [RxJava Hooks](https://www.baeldung.com/rxjava-hooks)
 - [Retry with Delay in RxJava](https://www.baeldung.com/rxjava-retry-with-delay)
+- [RxJava Single.just() vs Single.fromCallable()](https://www.baeldung.com/rxjava-single-just-single-fromcallable)