@misc{owl-sas-w3c,
  title = "{OWL} {W}eb {O}ntology {L}anguage Semantics and Abstract Syntax",
  author = "Peter F. Patel-Schneider and Patrick Hayes and Ian Horrocks",
  year = "2004",
  howpublished = "{W3C} {R}ecommendation",
  institution = "World Wide Web Consortium",
  month = "10 February",
  note = "Available at \url{http://www.w3.org/TR/owl-semantics/}",
  url = "<a href="http://www.w3.org/TR/owl-semantics/">http://www.w3.org/TR/owl-semantics/</a>",
}