@inproceedings{ijcai2001p54,
  title     = {Reasoning about Categories in Conceptual Spaces},
  author    = {Gärdenfors, Peter and Williams, Mary-Anne},
  booktitle = {Proceedings of the Seventeenth International Joint Conference on
               Artificial Intelligence, {IJCAI-01}},
  publisher = {International Joint Conferences on Artificial Intelligence},
  pages     = {385--391},
  year      = {2001},
  url       = {https://ijcai.org/proceedings/2001/54},
}