@inproceedings{MagKazHor:10:NDR:DL,
  title = "Tractable Extensions of the Description Logic {EL} with Numerical Datatypes",
  author = "Despoina Magka and Yevgeny Kazakov and Ian Horrocks",
  year = "2010",
  booktitle = "Description Logics",
  edition = "Volker Haarslev, David Toman, and Grant Weddell",
  publisher = "CEUR-WS.org",
  series = "CEUR Workshop Proceedings",
  url = "http://CEUR-WS.org/Vol-573/paper_29.pdf",
  volume = "573",
}