@InProceedings{TurBo-DL07,
  title = 	 {Speeding up Approximation with Nicer Concepts},
  year = 	 {2007},
  author = 	 {A.-Y. Turhan and Y. Bong},
  editor = 	 {D.~Calvanese and  E.~Franconi and V.~Haarslev and D.~Lembo and B.~Motik and  S.~Tessaris and A.-Y.~Turhan},
  booktitle = 	 {Proc.\ of the 2007 Description Logic Workshop (DL 2007)}
}