@inproceedings{hmpuOWLED2009,
  title = "Practical Considerations for Query Answering in OWL 2",
  author = "H\'ector P\'erez-Urbina and Ian Horrocks and Boris Motik",
  year = "2009",
  address = "Chantilly, VA, USA.",
  booktitle = "In Proc.\ of the OWL: Experiences and Directions Workshop (OWLED2009)",
  month = "October",
}