- https://arxiv.org/pdf/1602.01783.pdf
- http://ufal.mff.cuni.cz/~straka/courses/npfl114/2016/sutton-bookdraft2016sep.pdf
- http://karpathy.github.io/2016/05/31/rl/
- Xavier Glorot and Yoshua Bengio, Understanding the difficulty of training deep feedforward neural networks, Proceedings of the Thirteenth International Conference on Artificial Intelligence and Statistics, 2010, http://proceedings.mlr.press/v9/glorot10a/glorot10a.pdf