@inproceedings{Zivny09:mfcs,
  title = "The expressive power of binary submodular functions",
  author = "Stanislav \vZ}ivn\'y and David A. Cohen and Peter G. Jeavons",
  year = "2009",
  booktitle = "Proceedings of the 34th International Symposium on Mathematical Foundations of Computer Science (MFCS'09)",
  series = "Lecture Notes in Computer Science",
  url = "http://zivny.cz/publications/zcj09mfcs-preprint.pdf",
}