@Article{BaaderSattlerIS-02,
  author = 	 {F. Baader and U. Sattler},
  title = 	 {Description Logics with Aggregates and Concrete Domains},
  journal = 	 {Information Systems},
  year = 	 2003,
  volume =	 28,
  number = 8,
  freecopy =     "yes",
  pages = {979--1004},
}