@inproceedings{ckpsz09:cp,
  title = "Same-relation constraints",
  author = "Christopher Jefferson and Serdar Kadioglu and Karen E. Petrie and Meinolf Sellmann and Stanislav \v{Z}ivn\'y",
  year = "2009",
  booktitle = "{P}roceedings of the 15th {I}nternational {C}onference on {P}rinciples and {P}ractice of {C}onstraint {P}rogramming ({C}{P}'09)",
  pages = "470--485",
  publisher = "Springer",
  series = "Lecture Notes in Computer Science",
  url = "http://zivny.cz/publications/jkpsz09cp-preprint.pdf",
  volume = "5732",
  doi = "10.1007/978-3-642-04244-7_38",
}