@inproceedings{ijcai2018p405,
  title     = {Multi-Level Metric Learning via Smoothed Wasserstein Distance},
  author    = {Jie Xu and Lei Luo and Cheng Deng and Heng Huang},
  booktitle = {Proceedings of the Twenty-Seventh International Joint Conference on
               Artificial Intelligence, {IJCAI-18}},
  publisher = {International Joint Conferences on Artificial Intelligence Organization},
  pages     = {2919--2925},
  year      = {2018},
  month     = {7},
  doi       = {10.24963/ijcai.2018/405},
  url       = {https://doi.org/10.24963/ijcai.2018/405},
}