From a2e544aa69a6bc5082ddf5ac7ed07d50d2867707 Mon Sep 17 00:00:00 2001
From: johnA1331 <53036378+johnA1331@users.noreply.github.com>
Date: Thu, 4 Feb 2021 00:09:00 +0800
Subject: [PATCH] Update README.md

---
 core-java-modules/core-java-concurrency-advanced-4/README.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/core-java-modules/core-java-concurrency-advanced-4/README.md b/core-java-modules/core-java-concurrency-advanced-4/README.md
index 98f2894515..5b93cec0dd 100644
--- a/core-java-modules/core-java-concurrency-advanced-4/README.md
+++ b/core-java-modules/core-java-concurrency-advanced-4/README.md
@@ -1,3 +1,4 @@
 ### Relevant Articles:
 
 - [Binary Semaphore vs Reentrant Lock](https://www.baeldung.com/java-binary-semaphore-vs-reentrant-lock)
+- [Bad Practices With Synchronization](https://www.baeldung.com/java-synchronization-bad-practices)