@inproceedings{ijcai1987p204,
  title     = {Complete Inference Rules for the Cancellation Laws},
  author    = {Hsiang, Jieh and Rusinowitch, Michaël and Sakai, Kô},
  booktitle = {Proceedings of the Tenth International Joint Conference on
               Artificial Intelligence, {IJCAI-87}},
  publisher = {International Joint Conferences on Artificial Intelligence},
  editor    = {John McDermott},
  pages     = {990--991},
  year      = {1987},
  note      = {Reasoning},
  url       = {https://ijcai.org/proceedings/1987/204},
}