@inproceedings{ijcai1997p74,
  title     = {A Causal Time Ontology for Qualitative Reasoning},
  author    = {Kitamura, Yoshinobu and Ikeda, Mitsuru and Mizoguchi, Riichiro},
  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     = {501--506},
  year      = {1997},
  note      = {Diagnosis and Qualitative Reasoning},
  url       = {https://ijcai.org/proceedings/1997/74},
}