@inproceedings{ijcai2005p6,
  title     = {Data Complexity of Reasoning in Very Expressive Description Logics},
  author    = {Hustadt, Ullrich and Motik, Boris and Sattler, Ulrike},
  booktitle = {Proceedings of the Nineteenth International Joint Conference on
               Artificial Intelligence, {IJCAI-05}},
  publisher = {International Joint Conferences on Artificial Intelligence},
  pages     = {466--470},
  year      = {2005},
  url       = {https://ijcai.org/proceedings/2005/6},
}