@inproceedings{ijcai2007p88,
  title     = {Description Logics with Approximate Definitions - Precise Modeling of Vague Concepts},
  author    = {Schlobach, Stefan and Klein, Michel C. A. and Peelen, Linda},
  booktitle = {Proceedings of the Twentieth International Joint Conference on
               Artificial Intelligence, {IJCAI-07}},
  publisher = {International Joint Conferences on Artificial Intelligence},
  editor    = {Ramon López de Mántaras},
  pages     = {557--561},
  year      = {2007},
  url       = {https://ijcai.org/proceedings/2007/88},
}