@inproceedings{PPDP-2006-Fruhwirth,
	author        = "Thom W. Frühwirth",
	booktitle     = "{Proceedings of the Eighth International Conference on Principles and Practice of Declarative Programming}",
	doi           = "10.1145/1140335.1140337",
	isbn          = "1-59593-388-3",
	pages         = "13--14",
	publisher     = "{ACM}",
	title         = "{Constraint handling rules: the story so far}",
	year          = 2006,
}