@InProceedings{wang-EtAl:2018:EMNLP4,
  author    = {Wang, Xinyi  and  Pham, Hieu  and  Dai, Zihang  and  Neubig, Graham},
  title     = {SwitchOut: an Efficient Data Augmentation Algorithm for Neural Machine Translation},
  booktitle = {Proceedings of the 2018 Conference on Empirical Methods in Natural Language Processing},
  month     = {October-November},
  year      = {2018},
  address   = {Brussels, Belgium},
  publisher = {Association for Computational Linguistics},
  pages     = {856--861},
  url       = {http://www.aclweb.org/anthology/D18-1100}
}