@inproceedings{ComplexityMaximal,
  title = "The complexity of maximal constraint languages",
  author = "Andrei Bulatov and Andrei Krokhin and Peter Jeavons",
  year = "2001",
  booktitle = "Proceedings of STOC'01, Crete, Greece",
  note = "Earlier version available as an OUCL Research Report : \url{http://web.comlab.ox.ac.uk/oucl/publications/tr/rr-01-03.html}",
  pages = "667--674",
  doi = "10.1145/380752.380868",
}