@inproceedings{ijcai2001p20,
  title     = {Computing Strongest Necessary and Weakest Sufficient Conditions of First-Order Formulas},
  author    = {Doherty, Patrick and Lukaszewicz, Witold and Szalas, Andrzej},
  booktitle = {Proceedings of the Seventeenth International Joint Conference on
               Artificial Intelligence, {IJCAI-01}},
  publisher = {International Joint Conferences on Artificial Intelligence},
  pages     = {145--153},
  year      = {2001},
  url       = {https://ijcai.org/proceedings/2001/20},
}