@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",
}
@article{hmpuISWC2009,
  title = "{Efficient Query Answering for 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 Int.\ Semantic Web Conference (ISWC2009)",
  month = "October",
  note = "to appear",
}
@inproceedings{hmpuDL09,
  title = "{A Comparison of Query Rewriting Techniques for DL-Lite}",
  author = "H\'ector P\'erez-Urbina and Boris Motik and Ian Horrocks",
  year = "2009",
  address = "Oxford, UK.",
  booktitle = "In Proc.\ of the Int.\ Workshop on Description Logics (DL2009)",
  month = "July",
}
@article{hmpuJAL09,
  title = "{Tractable Query Answering and Rewriting under Description Logic Constraints}",
  author = "H\'ector P\'erez-Urbina and Boris Motik and Ian Horrocks",
  year = "2009",
  journal = "Journal of Applied Logic",
  note = "to appear",
}
@inproceedings{pumh2008rewritinga,
  title = "{Rewriting Conjunctive Queries under Description Logic Constraints}",
  author = "H{\'e}ctor P{\'e}rez-Urbina and Boris Motik and Ian Horrocks",
  year = "2008",
  address = "Rome, Italy",
  booktitle = "Proc. of the Int.\ Workshop on Logics in Databases (LID 2008)",
  month = "May",
}
@techreport{TR-ELHI,
  title = "{Rewriting Conjunctive Queries under Description Logic Constraints (Technical Report)}",
  author = "H{\'e}ctor P{\'e}rez-Urbina and Boris Motik and Ian Horrocks",
  year = "2008",
  institution = "University of Oxford",
  month = "February",
}
@inproceedings{pumh08rewriting,
  title = "{Rewriting Conjunctive Queries over Description Logic Knowledge Bases}",
  author = "H{\'e}ctor P{\'e}rez-Urbina and Boris Motik and Ian Horrocks",
  year = "2008",
  address = "Nantes, France",
  booktitle = "Proc. of the Int.\ Workshop on Semantics in Data and Knowledge Bases (SDKB 2008)",
  month = "March",
  publisher = "Springer",
}