@inproceedings{HoPa03c, title = "Reducing {OWL} Entailment to Description Logic Satisfiability", author = "Ian Horrocks and Peter F. Patel-Schneider", year = "2003", booktitle = "Proc.\ of the 2003 Description Logic Workshop (DL~2003)", pages = "1--8", series = "CEUR (\url{http://ceur-ws.org/})", url = "download/2003/HoPa03c.pdf", volume = "81", }