@inproceedings{ICLP-1993-SakamaI,
	author        = "Chiaki Sakama and Katsumi Inoue",
	booktitle     = "{Proceedings of the 10th International Conference on Logic Programming}",
	isbn          = "0-262-73105-3",
	pages         = "703--719",
	publisher     = "{MIT Press}",
	title         = "{Negation in Disjunctive Logic Programs}",
	year          = 1993,
}