@article{SupermodularFunctions,
  title = "Supermodular functions and the complexity of MAX CSP",
  author = "David Cohen and Martin Cooper and Peter Jeavons and Andrei Krokhin",
  year = "2005",
  journal = "Discrete Applied Mathematics",
  note = "Earlier version appeared as Identifying efficiently solvable cases of Max CSP \url{http://web.comlab.ox.ac.uk/oucl/research/areas/constraints/publications/STACS04maxCSP.ps} in: Proceedings of STACS'04, Lecture Notes in Computer Science 2996 (2004)",
  pages = "53-72",
  url = "http://www.comlab.ox.ac.uk/activities/constraints/publications/DAMsupermodular.pdf",
  volume = "149",
  doi = "10.1016/j.dam.2005.03.003",
}