@inproceedings{modellinghierarchicalstructurebetween,
  title = {Modelling Hierarchical Structure between Dialogue Policy and Natural Language Generator with Option Framework for Task-oriented Dialogue System},
  author = {Jianhong Wang and Yuan Zhang and Tae-Kyun Kim and Yunjie Gu},
  year = {2020},
  booktitle = {ICLR 2021 1},
  eprint = {2006.06814},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2006.06814v4},
}