@inproceedings{ILPS-1993-DongL,
	author        = "Fangqing Dong and Laks V. S. Lakshmanan",
	booktitle     = "{Proceedings of the International Symposium on Logic Programming}",
	isbn          = "0-262-63152-0",
	pages         = "609--628",
	publisher     = "{MIT Press}",
	title         = "{A Deductive Approach to Hypothetical Query Answering}",
	year          = 1993,
}