@inproceedings{ijcai2015p258,
  title     = {Exploring Implicit Hierarchical Structures for Recommender Systems},
  author    = {Wang, Suhang and Tang, Jiliang and Wang, Yilin and Liu, Huan},
  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     = {1813--1818},
  year      = {2015},
  month     = {7},
  note      = {Main Track},
  url       = {https://ijcai.org/proceedings/2015/258},
}