@inproceedings{zj09:cp,
  title = "The complexity of valued constraint models",
  author = "Stanislav \v{Z}ivn\'y and Peter G. Jeavons",
  year = "2009",
  booktitle = "{P}roceedings of the 15th {I}nternational {C}onference on {P}rinciples and {P}ractice of {C}onstraint {P}rogramming ({C}{P}'09)",
  pages = "833--841",
  publisher = "Springer",
  series = "Lecture Notes in Computer Science",
  url = "http://zivny.cz/publications/zj09cp-preprint.pdf",
  volume = "5732",
  doi = "10.1007/978-3-642-04244-7_64",
}