@inproceedings{ijcai1973p49,
  title     = {Proving the Impossible is Impossible is Possible: Disproofs Based on Hereditary Partitions},
  author    = {Siklóssy, Laurent and Roach, John W.},
  booktitle = {Proceedings of the Third International Joint Conference on
               Artificial Intelligence, {IJCAI-73}},
  publisher = {International Joint Conferences on Artificial Intelligence},
  editor    = {Nils J. Nilsson},
  pages     = {383--386},
  year      = {1973},
  month     = {8},
  note      = {Robot Problem Solving},
  url       = {https://ijcai.org/proceedings/1973/49},
}