@inproceedings{NACLP-1989-GaifmanMS,
	author        = "Haim Gaifman and Michael J. Maher and Ehud Y. Shapiro",
	booktitle     = "{Proceedings of the North American Conference on Logic Programming, 2 Volumes}",
	isbn          = "0-262-62064-2",
	pages         = "553--569",
	publisher     = "{MIT Press}",
	title         = "{Reactive Behaviour Semantics for Concurrent Constraint Logic Programs}",
	year          = 1989,
}