@inproceedings{ijcai2007p236,
  title     = {Incompleteness and Incomparability in Preference Aggregation},
  author    = {Pini, Maria Silvia and Rossi, Francesca and Venable, Kristen Brent and Walsh, Toby},
  booktitle = {Proceedings of the Twentieth International Joint Conference on
               Artificial Intelligence, {IJCAI-07}},
  publisher = {International Joint Conferences on Artificial Intelligence},
  editor    = {Ramon López de Mántaras},
  pages     = {1464--1468},
  year      = {2007},
  url       = {https://ijcai.org/proceedings/2007/236},
}