@InProceedings{Krisnadhi-Lutz-DL-07,
  author = {A. Krisnadhi and C. Lutz},
  title = {Data Complexity in the $\mathcal{EL}$ family of DLs},
  booktitle = {Proceedings of the 2007 International Workshop on Description Logics ({DL2007})},
  year = {2007},
  series = {CEUR-WS},
}