@inproceedings{ICLP-1991-Dung,
	author        = "Phan Minh Dung",
	booktitle     = "{Proceedings of the Eighth International Conference on Logic Programming}",
	isbn          = "0-262-56058-5",
	note          = "long version: JLP 22(2): 151-171 (1995)",
	pages         = "3--17",
	publisher     = "{MIT Press}",
	title         = "{Negations as Hypotheses: An Abductive Foundation for Logic Programming}",
	year          = 1991,
}