@inproceedings{ILPS-1995-FerrandL,
	author        = "Gérard Ferrand and Arnaud Lallouet",
	booktitle     = "{Proceedings of the International Symposium on Logic Programming}",
	isbn          = "0-262-62099-5",
	pages         = "209--223",
	publisher     = "{MIT Press}",
	title         = "{A Compositional Proof Method of Partial Correctness for Normal Logic Programs}",
	year          = 1995,
}