@inproceedings {4992,
	title = {Rewriting Aggregate Queries Using Description Logic},
	booktitle = {International Workshop on Description Logics (DL)},
	year = {2003},
	url = {http://ceur-ws.org/Vol-81/toman.pdf},
	author = {David DeHaan and David Toman and Grant Weddell}
}
