@InProceedings{tang-EtAl:2018:EMNLP1,
  author    = {Tang, Da  and  Li, Xiujun  and  Gao, Jianfeng  and  Wang, Chong  and  Li, Lihong  and  Jebara, Tony},
  title     = {Subgoal Discovery for Hierarchical Dialogue Policy Learning},
  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     = {2298--2309},
  url       = {http://www.aclweb.org/anthology/D18-1253}
}