@article{wang2018look,
  title={Look Before You Leap: Bridging Model-Free and Model-Based Reinforcement Learning for Planned-Ahead Vision-and-Language Navigation},
  author={Wang, Xin and Xiong, Wenhan and Wang, Hongmin and Wang, William Yang},
  journal={Proceedings of the European Conference on Computer Vision (ECCV 2018)},
  year={2018}
}