@inproceedings{ALP-1990-GabbrielliL,
	author        = "Maurizio Gabbrielli and Giorgio Levi",
	booktitle     = "{Proceedings of the Second International Conference on Algebraic and Logic Programming}",
	doi           = "10.1007/3-540-53162-9_40",
	isbn          = "3-540-53162-9",
	pages         = "204--216",
	publisher     = "{Springer-Verlag}",
	series        = "{Lecture Notes in Computer Science}",
	title         = "{Unfolding and Fixpoint Semantics of Concurrent Constraint Logic Programs}",
	volume        = 463,
	year          = 1990,
}