@article{gu2019improved,
  title={Improved Zero-shot Neural Machine Translation via Ignoring Spurious Correlations},
  author={Jiatao Gu, Yong Wang, Kyunghyun Cho, Victor OK Li},
  journal={arXiv preprint arXiv:1906.01181},
  url={https://arxiv.org/abs/1906.01181},
  year={2019}
}