@inproceedings{ijcai2005p69,
  title     = {The Range and Roots Constraints: Specifying Counting and Occurrence Problems},
  author    = {Bessiere, Christian and Hebrard, Emmanuel and Hnich, Brahim and Kiziltan, Zeynep and Walsh, Toby},
  booktitle = {Proceedings of the Nineteenth International Joint Conference on
               Artificial Intelligence, {IJCAI-05}},
  publisher = {International Joint Conferences on Artificial Intelligence},
  pages     = {60--64},
  year      = {2005},
  url       = {https://ijcai.org/proceedings/2005/69},
}