@inproceedings{ijcai1985p128,
  title     = {Learning Intermediate Concepts in Constructing a Hierarchical Knowledge Base},
  author    = {Fu, LiMin and Buchanan, Bruce G.},
  booktitle = {Proceedings of the Ninth International Joint Conference on
               Artificial Intelligence, {IJCAI-85}},
  publisher = {International Joint Conferences on Artificial Intelligence},
  editor    = {Aravind Joshi},
  pages     = {659--665},
  year      = {1985},
  note      = {Learning and Acquisition},
  url       = {https://ijcai.org/proceedings/1985/128},
}