@inproceedings{ijcai1977p125,
  title     = {Formal Grammars as Models of Logic Derivations},
  author    = {Sickel, Sharon},
  booktitle = {Proceedings of the Fifth International Joint Conference on
               Artificial Intelligence, {IJCAI-77}},
  publisher = {International Joint Conferences on Artificial Intelligence},
  editor    = {Raj Reddy},
  pages     = {544--550},
  year      = {1977},
  note      = {Theorem Proving},
  url       = {https://ijcai.org/proceedings/1977/125},
}