@inproceedings{ijcai2009p124,
  title     = {Regular Path Queries in Expressive Description Logics with Nominals},
  author    = {Calvanese, Diego and Eiter, Thomas and Ortiz, Magdalena},
  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     = {714--719},
  year      = {2009},
  url       = {https://ijcai.org/proceedings/2009/124},
}