@inproceedings{WSA-1991-DenisD,
	author        = "François Denis and Jean-Paul Delahaye",
	booktitle     = "{Proceedings of the First Workshop on Static Analysis at JTASPEFL in Bordeaux}",
	pages         = "157--164",
	publisher     = "{Atelier Irisa, IRISA, Campus de Beaulieu}",
	series        = "{Series Bigre}",
	title         = "{Unfolding, Procedural and Fixpoint Semantics of Logic Programs}",
	volume        = 74,
	year          = 1991,
}