@inproceedings{ccjz11:mfcs,
  title = "An algebraic theory of complexity for valued constraints: Establishing a Galois connection",
  author = "David A. Cohen and P\'aid\'i Creed and Peter G. Jeavons and Stanislav \v{Z}ivn\'y",
  year = "2011",
  booktitle = "Proceedings of the 36th International Symposium on Mathematical Foundations of Computer Science (MFCS'11)",
  pages = "231--242",
  publisher = "Springer",
  series = "Lecture Notes in Computer Science",
  url = "http://zivny.cz/publications/ccjz11mfcs-preprint.pdf",
  volume = "6907",
  doi = "10.1007/978-3-642-22993-0_23",
}