@article{DecomposingConstraint,
  title = "Decomposing Constraint Satisfaction Problems Using Database Techniques",
  author = "M.Gyssens and P.G.Jeavons and D.A.Cohen",
  year = "1994",
  journal = "Artificial Intelligence",
  number = "66(1)",
  pages = "57-89",
  url = "ftp://ftp.cs.rhul.ac.uk/pub/constraints/decomposing.ps",
}