@article{zj10:constraints,
  title = "{C}lasses of {S}ubmodular {C}onstraints {E}xpressible by {G}raph {C}uts",
  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",
}