@inproceedings{ijcai2001p116,
  title     = {OI-implication: Soundness and Refutation Completeness},
  author    = {Esposito, Floriana and Fanizzi, Nicola and Ferilli, Stefano and Semeraro, Giovanni},
  booktitle = {Proceedings of the Seventeenth International Joint Conference on
               Artificial Intelligence, {IJCAI-01}},
  publisher = {International Joint Conferences on Artificial Intelligence},
  pages     = {847--851},
  year      = {2001},
  url       = {https://ijcai.org/proceedings/2001/116},
}