@inproceedings{ijcai2015p342,
  title     = {Tackling Data Sparseness in Recommendation using Social Media based Topic Hierarchy Modeling},
  author    = {Zhu, Xingwei and Ming, Zhaoyan and Hao, Yu and Zhu, Xiaoyan},
  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     = {2415--2422},
  year      = {2015},
  month     = {7},
  note      = {Main Track},
  url       = {https://ijcai.org/proceedings/2015/342},
}