Add neural network illustrations

References.md

@@ -9,6 +9,7 @@
 
 * [形象直观了解谷歌大脑新型优化器LAMB](https://www.toutiao.com/i6687162064395305475/)
 * [5种常用的交叉验证技术，保证评估模型的稳定性](https://m.toutiaocdn.com/i6838062457596936718)
+* [The Neural network zoo](https://www.asimovinstitute.org/neural-network-zoo/) : 各种神经网络架构的解释、图示
 * 22 个神经网络结构设计/可视化工具
 	- https://www.toutiao.com/i6836884346155041292/
 - https://github.com/ashishpatel26/Tools-to-Design-or-Visualize-Architecture-of-Neural-Network