@article{counterfactualoffpolicytrainingforneural,
  title = {Counterfactual Off-Policy Training for Neural Response Generation},
  author = {Qingfu Zhu and Wei-Nan Zhang and Ting Liu and William Yang Wang},
  year = {2020},
  eprint = {2004.14507},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2004.14507v2},
}