@InProceedings{BrandtModel-KI2005,
  author =       {Sebastian Brandt and J{\"o}rg Model},
  title =        {Subsumption in {$\cal EL$} w.r.t.\ hybrid TBoxes},
  booktitle =    {Proceedings of the 28th Annual German Conference on Artificial Intelligence, {KI 2005}},  
  year =         2005,
  series =       {Lecture Notes in Artificial Intelligence},
  publisher =    {Springer-Verlag},
  springer =     {yes},
}