@article{differentiablelowerboundforexpectedbleu,
  title = {Differentiable lower bound for expected BLEU score},
  author = {Vlad Zhukov and Eugene Golikov and Maksim Kretov},
  year = {2017},
  eprint = {1712.04708},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1712.04708v4},
}