@article {16469,
	title = {Query planning in the presence of overlapping sources},
	journal = {Advances in Database Technology-EDBT 2006},
	year = {2006},
	month = {2006///},
	pages = {811 - 828},
	author = {Bleiholder,J. and Khuller, Samir and Naumann,F. and Raschid, Louiqa and Wu,Y.}
}
