diff --git a/robots/ANYmal.md b/robots/ANYmal.md
index 70f483b..8b2538a 100644
--- a/robots/ANYmal.md
+++ b/robots/ANYmal.md
@@ -52,3 +52,8 @@
 
 ## 拓展
 [官网链接](http://www.rsl.ethz.ch/robots-media/anymal.html)
+
+[论文](https://ieeexplore.ieee.org/document/7758092)
+
+## TODO
+- 理解论文的控制方法