@inproceedings{ijcai1973p74,
  title     = {CASAP: A Testbed for Program Flexibility},
  author    = {Balzer, Robert},
  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     = {601--604},
  year      = {1973},
  month     = {8},
  note      = {General Problem Solving},
  url       = {https://ijcai.org/proceedings/1973/74},
}