@inproceedings{ijcai2013p449,
  title     = {Collaborative Filtering on Ordinal User Feedback},
  author    = {Koren, Yehuda and Sill, Joseph},
  booktitle = {Proceedings of the Twenty-Third International Joint Conference on
               Artificial Intelligence, {IJCAI-13}},
  publisher = {AAAI Press / International Joint Conferences on Artificial Intelligence},
  editor    = {Francesca Rossi},
  pages     = {3022--3025},
  year      = {2013},
  month     = {8},
  url       = {https://ijcai.org/proceedings/2013/449},
}