@article {D'Altan:1996:0924-8463:77,
	author = "D'Altan P. and Meyer J.-J.C. and Wieringa R.J.",
	title = "An Integrated Framework for Ought-to-Be and Ought-to-Do Constraints",
	journal = "Artificial Intelligence and Law",
	volume = "4",
	number = "2",
	year = "1996",
	abstract = "No Abstract",
	pages = "77-111",
	url = "http://www.ingentaconnect.com/content/klu/arti/1996/00000004/00000002/00109510"
}