@inproceedings{ijcai1987p31,
  title     = {How Can a Program Mean?},
  author    = {Perlis, Donald},
  booktitle = {Proceedings of the Tenth International Joint Conference on
               Artificial Intelligence, {IJCAI-87}},
  publisher = {International Joint Conferences on Artificial Intelligence},
  editor    = {John McDermott},
  pages     = {163--165},
  year      = {1987},
  note      = {Cognitive Modeling},
  url       = {https://ijcai.org/proceedings/1987/31},
}