@inproceedings{ILPS-1993-KirschenbaumS,
	author        = "Marc Kirschenbaum and Leon Sterling",
	booktitle     = "{Proceedings of the International Symposium on Logic Programming}",
	isbn          = "0-262-63152-0",
	pages         = "631",
	publisher     = "{MIT Press}",
	title         = "{Enhancement Structures for Proving Prolog Programs Correct}",
	year          = 1993,
}