@article{ZJ10constraints,
  title = "Classes of submodular constraints expressible by graph cuts",
  author = "Stanislav \v{Z}ivn\'y and Peter G. Jeavons",
  year = "2010",
  journal = "Constraints",
  number = "3",
  pages = "430-452",
  url = "http://zivny.cz/publications/zj10constraints-preprint.pdf",
  volume = "15",
  doi = "10.1007/s10601-009-9078-z",
}