@inproceedings{ijcai1997p207,
  title     = {Defeasible Specifications in Action Theories},
  author    = {Baral, Chitta and Lobo, Jorge},
  booktitle = {Proceedings of the Fifteenth International Joint Conference on
               Artificial Intelligence, {IJCAI-97}},
  publisher = {International Joint Conferences on Artificial Intelligence},
  editor    = {Martha E. Pollack},
  pages     = {1441--1445},
  year      = {1997},
  note      = {Temporal Reasoning},
  url       = {https://ijcai.org/proceedings/1997/207},
}