@inproceedings{ILPS-1993-PalopoliZ,
	author        = "Luigi Palopoli and Carlo Zaniolo",
	booktitle     = "{Proceedings of the International Symposium on Logic Programming}",
	isbn          = "0-262-63152-0",
	pages         = "645",
	publisher     = "{MIT Press}",
	title         = "{Polynominal Time Computable Stable Models}",
	year          = 1993,
}