@Article{BaaderSattler-JLC-99,
  author = 	 {Baader, F. and Sattler, U.},
  title = 	 {Expressive Number Restrictions in Description Logics}, 
  journal = 	 {Journal of Logic and Computation},
  year = 	 1999,
  volume = 9,
number = 	 3,
pages = 	 {319--350},
  ccl =          yes,
  jlc =          yes,
  freecopy =     yes
}