@conference{MaKHDL2010,
  title = "Tractabe Extensions of the Description Logic EL with Numerical Datatypes",
  author = "Despoina Magka and Yevgeny Kazakov and Ian Horrocks",
  year = "2010",
  affiliation = "Oxford University Computing Laboratory",
  howpublished = "23rd International Workshop on Description Logics (DL 2010)",
  journal = "23rd International Workshop on Description Logics (DL 2010)",
}