@inproceedings{Grathwohletal2018relax,
  title={Backpropagation through the Void: Optimizing control variates for black-box gradient estimation},
  author={Will Grathwohl and Dami Choi and Yuhuai Wu and Geoff Roeder and David Duvenaud},
  journal={International Conference on Learning Representations},
  year={2018}
}