@inproceedings{Zivny09:same,
  author = "Christopher Jefferson and Serdar Kadioglu and Karen E. Petrie and Meinolf Sellmann and Stanislav \v{Z}ivn\'y",
  booktitle = "Proceedings of the 15th International Conference on Principles and Practice of Contraint Programming (CP'09)",
  doi = "10.1007/978-3-642-04244-7_38",
  number = "5732",
  series = "Lecture Notes in Computer Science",
  title = "Same-relation constraints",
  url = "http://zivny.cz/publications/jkpsz09cp-preprint.pdf",
  year = "2009",
}