@inproceedings{ijcai2007p15,
  title     = {Distance Constraints in Constraint Satisfaction},
  author    = {Hebrard, Emmanuel and O'Sullivan, Barry 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     = {106--110},
  year      = {2007},
  url       = {https://ijcai.org/proceedings/2007/15},
}