@inproceedings{ijcai2001p13,
  title     = {On the Semantics of Knowledge Update},
  author    = {Baral, Chitta and Zhang, Yan},
  booktitle = {Proceedings of the Seventeenth International Joint Conference on
               Artificial Intelligence, {IJCAI-01}},
  publisher = {International Joint Conferences on Artificial Intelligence},
  pages     = {97--101},
  year      = {2001},
  url       = {https://ijcai.org/proceedings/2001/13},
}