@inproceedings{ijcai2009p161,
  title     = {Applications and Extensions of PTIME Description Logics with Functional Constraints},
  author    = {Toman, David and Weddell, Grant E.},
  booktitle = {Proceedings of the Twenty-First International Joint Conference on
               Artificial Intelligence, {IJCAI-09}},
  publisher = {International Joint Conferences on Artificial Intelligence},
  editor    = {Hiroaki Kitano},
  pages     = {948--953},
  year      = {2009},
  url       = {https://ijcai.org/proceedings/2009/161},
}