@inproceedings{ijcai2001p45,
  title     = {Making AC-3 an Optimal Algorithm},
  author    = {Zhang, Yuanlin and Yap, Roland H.C.},
  booktitle = {Proceedings of the Seventeenth International Joint Conference on
               Artificial Intelligence, {IJCAI-01}},
  publisher = {International Joint Conferences on Artificial Intelligence},
  pages     = {316--320},
  year      = {2001},
  url       = {https://ijcai.org/proceedings/2001/45},
}