@inproceedings{ICLP-1991-HuY,
	author        = "Yong Hu and Li-Yan Yuan",
	booktitle     = "{Proceedings of the Eighth International Conference on Logic Programming}",
	isbn          = "0-262-56058-5",
	pages         = "412--425",
	publisher     = "{MIT Press}",
	title         = "{Extended Well-Founded Model Semantics for General Logic Programs}",
	year          = 1991,
}