@inproceedings{ijcai2003p31,
  title     = {Reasoning about soft constraints and conditional preferences: complexity results and approximation techniques},
  author    = {Domshlak, Carmel and Rossi, Francesca and Venable, Kristen Brent and Walsh, Toby},
  booktitle = {Proceedings of the Eighteenth International Joint Conference on
               Artificial Intelligence, {IJCAI-03}},
  publisher = {International Joint Conferences on Artificial Intelligence},
  editor    = {Georg Gottlob},
  pages     = {215--219},
  year      = {2003},
  url       = {https://ijcai.org/proceedings/2003/31},
}