@article{ConstraintsConsistencyClosure,
  title = "Constraints, Consistency and Closure",
  author = "P.G.Jeavons and D.A.Cohen and M.Cooper",
  year = "1998",
  journal = "Artificial Intelligence",
  number = "101 (1-2)",
  pages = "251--265",
  url = "ftp://ftp.cs.rhul.ac.uk/pub/constraints/conconclo.ps",
}