[Original Paper - GradientBased Learning Applied to Document Recognition (1998)](http://vision.stanford.edu/cs598_spring07/papers/Lecun98.pdf)  
[Related Video](https://www.youtube.com/watch?v=fcOW-Zyb5Bo)

Some other useful links
- [Understanding and Implementing LeNet-5 CNN Architecture](https://towardsdatascience.com/understanding-and-implementing-lenet-5-cnn-architecture-deep-learning-a2d531ebc342)