@inproceedings{ILPS-1997-MullerW,
	author        = "Tobias Müller and Jörg Würtz",
	booktitle     = "{Proceedings of the International Symposium on Logic Programming}",
	isbn          = "0-262-63180-6",
	pages         = "149--163",
	publisher     = "{MIT Press}",
	title         = "{Extending a Concurrent Constraint Language by Propagators}",
	year          = 1997,
}