@article{ma2020monotonic,
  title={Monotonic multihead attention},
  author={Xutai Ma, Juan Pino, James Cross, Liezl Puzon, Jiatao Gu},
  journal={arXiv preprint arXiv:1909.12406},
  url={https://arxiv.org/abs/1909.12406},
  year={2020}
}