@article{HADK+03,
  title = "Where Are the Rules?",
  author = "Ian Horrocks and J{\"u}rgen Angele and Stefan Decker and Michael Kifer and Benjamin N. Grosof and Gerd Wagner",
  year = "2003",
  issn = "1094-7167",
  journal = "{IEEE} Intelligent Systems",
  number = "5",
  pages = "76--83",
  url = "<a href="http://csdl.computer.org/comp/mags/ex/2003/05/x5076abs.htm">http://csdl.computer.org/comp/mags/ex/2003/05/x5076abs.htm</a>",
  volume = "18",
}