@conference{NacGuLeeLev18,
  title = {Data-Efficient Hierarchical Reinforcement Learning},
  booktitle = {Advances in Neural Information Processing Systems 31 (NeurIPS 2018)},
  pages = {3307--3317},
  editors = {S. Bengio and H. Wallach and H. Larochelle and K. Grauman and N. Cesa-Bianchi and R. Garnett},
  publisher = {Curran Associates, Inc.},
  month = dec,
  year = {2018},
  author = {Nachum, O. and Gu, S. and Lee, H. and Levine, S.},
  url = {http://papers.nips.cc/paper/7591-data-efficient-hierarchical-reinforcement-learning.pdf},
  month_numeric = {12}
}