@inproceedings{ijcai2009p178,
  title     = {Learning Optimal Subsets with Implicit User Preferences},
  author    = {Guo, Yunsong and Gomes, Carla P.},
  booktitle = {Proceedings of the Twenty-First International Joint Conference on
               Artificial Intelligence, {IJCAI-09}},
  publisher = {International Joint Conferences on Artificial Intelligence},
  editor    = {Hiroaki Kitano},
  pages     = {1052--1056},
  year      = {2009},
  url       = {https://ijcai.org/proceedings/2009/178},
}