@inproceedings{Bulatov02:3-element,
  title = "A Dichotomy Theorem for Constraints on a Three-Element Set",
  author = "Andrei A. Bulatov",
  year = "2002",
  booktitle = "Proceedings of the 43rd Symposium on Foundations of Computer Science (FOCS'02)",
  url = "http://doi.ieeecomputersociety.org/10.1109/SFCS.2002.1181990",
}