@inproceedings{KR-1996-BaaderS,
	author        = "Franz Baader and Ulrike Sattler",
	booktitle     = "{Proceedings of the Fifth International Conference on Principles of Knowledge Representation and Reasoning}",
	isbn          = "1-55860-421-9",
	pages         = "328--339",
	publisher     = "{Morgan Kaufmann}",
	title         = "{Number Restrictions on Complex Roles in Description Logics: A Preliminary Report}",
	year          = 1996,
}