@inproceedings{ijcai2015p516,
  title     = {Regularizing Flat Latent Variables with Hierarchical Structures},
  author    = {Lin, Rongcheng and Li, Huayu and Quan, Xiaojun and Hong, Richang and Wu, Zhiang and Ge, Yong},
  booktitle = {Proceedings of the Twenty-Fourth International Joint Conference on
               Artificial Intelligence, {IJCAI-15}},
  publisher = {International Joint Conferences on Artificial Intelligence},
  editor    = {Qiang Yang and Michael Wooldridge},
  pages     = {3671--3676},
  year      = {2015},
  month     = {7},
  note      = {Special Track on Machine Learning},
  url       = {https://ijcai.org/proceedings/2015/516},
}