@inproceedings{VLDB-1997-VassalosP,
	author        = "Vasilis Vassalos and Yannis Papakonstantinou",
	booktitle     = "{Proceedings of the 23rd International Conference on Very Large Data Bases}",
	ee            = "http://www.vldb.org/conf/1997/P256.PDF",
	isbn          = "1-55860-470-7",
	pages         = "256--265",
	publisher     = "{Morgan Kaufmann}",
	title         = "{Describing and Using Query Capabilities of Heterogeneous Sources}",
	year          = 1997,
}