@inproceedings{TractableDisjunctive,
  title = "Tractable Disjunctive Constraints",
  author = "D.A.Cohen and P.G.Jeavons and M.Kourabarakis",
  year = "1997",
  booktitle = "Proceedings 3rd International Conference on Principles and Practice of Constraint Programming (CP97)",
  number = "1330",
  pages = "478--490",
  series = "Lecture Notes in Computer Science",
  url = "ftp://ftp.cs.rhul.ac.uk/pub/constraints/tractable.ps",
  volume = "1330",
  doi = "10.1007/BFb0017461",
}