@inproceedings{NDR-IJCAR,
  title = "Tractable Extensions of the Description Logic {EL} with Numerical Datatypes",
  author = "Despoina Magka and Yevgeny Kazakov and Ian Horrocks",
  year = "2010",
  booktitle = "In Proceedings of the 5th International Joint Conference on Automated Reasoning (IJCAR 2010)",
  publisher = "Springer",
  series = "LNCS",
}