@inproceedings{ALP-1996-FagesG,
	author        = "François Fages and Roberta Gori",
	booktitle     = "{Proceedings of the Fifth International Conference on Algebraic and Logic Programming}",
	doi           = "10.1007/3-540-61735-3_5",
	isbn          = "3-540-61735-3",
	pages         = "77--91",
	publisher     = "{Springer-Verlag}",
	series        = "{Lecture Notes in Computer Science}",
	title         = "{A Hierarchy of Semantics for Normal Constraint Logic Programs}",
	volume        = 1139,
	year          = 1996,
}