@inproceedings {5000,
	title = {On Attributes, Roles, and Dependencies in Description Logics and The Ackermann Case of the Decision Problem},
	booktitle = {International Workshop on Description Logics (DL)},
	year = {2001},
	url = {http://ceur-ws.org/Vol-49/TomanWeddell-76start.ps},
	author = {David Toman and Grant Weddell}
}
