@inproceedings{ijcai1971p49,
  title     = {Kernel Equivalence of Programs and Proving Kernel Equivalence and Correctness by Test Cases},
  author    = {Pratt, Terrence W.},
  booktitle = {Proceedings of the Second International Joint Conference on
               Artificial Intelligence, {IJCAI-71}},
  publisher = {International Joint Conferences on Artificial Intelligence},
  editor    = {D.C. Cooper},
  pages     = {474--479},
  year      = {1971},
  url       = {https://ijcai.org/proceedings/1971/49},
}