diff --git a/Study/DL/吴恩达深度学习课程/矩阵求导.md b/Study/DL/吴恩达深度学习课程/矩阵求导.md
index 0a34dce..87e24e1 100644
--- a/Study/DL/吴恩达深度学习课程/矩阵求导.md
+++ b/Study/DL/吴恩达深度学习课程/矩阵求导.md
@@ -50,4 +50,8 @@ $\frac{dB}{dA} = \frac{d(f(A))}{dA}$ 即 `B` 对 `A` 中的每个变量进行求
 	a_n
 	\end{matrix} \right]
 	= A
-    \end{aligned}$$
\ No newline at end of file
+    \end{aligned}$$
+## 参考资料
+https://www.bilibili.com/video/BV1xk4y1B7RQ
+https://zhuanlan.zhihu.com/p/263777564
+https://zhuanlan.zhihu.com/p/273729929
\ No newline at end of file