@inproceedings{ijcai1987p58,
  title     = {Inductive Inference of Context-free Languages - Context-free Expression Method},
  author    = {Yokomori, Takashi},
  booktitle = {Proceedings of the Tenth International Joint Conference on
               Artificial Intelligence, {IJCAI-87}},
  publisher = {International Joint Conferences on Artificial Intelligence},
  editor    = {John McDermott},
  pages     = {283--285},
  year      = {1987},
  note      = {Knowledge Acquisition},
  url       = {https://ijcai.org/proceedings/1987/58},
}