@article{Horr08a,
  title = "Ontologies and the semantic web",
  author = "Ian Horrocks",
  year = "2008",
  journal = "Communications of the {ACM}",
  month = "December",
  number = "12",
  pages = "58--67",
  url = "download/2008/Horr08a.pdf",
  volume = "51",
}