@InProceedings{BaSatDL97,
  author = 	 {Baader, F. and Sattler, U.},
  title = 	 {Description Logics with Aggregates and Concrete Domains},
  booktitle  = {Proceedings of the International Workshop on Description Logics},
  address     = {Gif sur Yvette, France},
  year       = {1997}},
  publisher =	 {Universit\'e Paris-Sud},
  note = {An extended version has appeared as Technical Report LTCS-97-01.}
}