@inproceedings{Salamon2008:perfect,
  title = "Perfect Constraints Are Tractable",
  author = "Andr{\'a}s Z. Salamon and Peter G. Jeavons",
  year = "2008",
  booktitle = "Proceedings of the 14th International Conference on Principles and Practice of Constraint Programming, {CP} 2008, Sydney, Australia, 14--18 September",
  isbn = "978-3-540-85957-4",
  pages = "524-528",
  publisher = "Springer",
  series = "Lecture Notes in Computer Science",
  url = "http://www.gaon.net/andras/academic/sj-cp2008.pdf",
  volume = "5202",
  doi = "10.1007/978-3-540-85958-1_35",
}