@inproceedings{ subjective-features-Recsys09,
  url = {http://www.cs.toronto.edu/~paolo/papers/ConceptUtilityElic_short.pdf},
  booktitle = {Proceedings of the 2009 ACM Conference on Recommender Systems, RecSys 2009, New York City, NY, USA, October 22-25, 2009},
  year = {2009},
  author = {Craig Boutilier and Kevin Regan and Paolo Viappiani},
  title = {Preference Elicitation with Subjective Features}
}