diff --git a/core-java-modules/core-java/src/main/java/com/baeldung/abstractclasses/README.md b/core-java-modules/core-java/src/main/java/com/baeldung/abstractclasses/README.md
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+## Relevant articles:
+
+- [Abstract Classes in Java](https://www.baeldung.com/java-abstract-class/)