@inproceedings{ijcai2003p51,
  title     = {Decidability of SHIQ with Complex Role Inclusion Axioms},
  author    = {Horrocks, Ian and Sattler, Ulrike},
  booktitle = {Proceedings of the Eighteenth International Joint Conference on
               Artificial Intelligence, {IJCAI-03}},
  publisher = {International Joint Conferences on Artificial Intelligence},
  editor    = {Georg Gottlob},
  pages     = {343--347},
  year      = {2003},
  url       = {https://ijcai.org/proceedings/2003/51},
}