@inproceedings{RE-1993-SibleyWMTL,
	author        = "Edgar H. Sibley and Richard L. Wexelblat and J. Bret Michael and Michael C. Tanner and David C. Littman",
	booktitle     = "{Proceedings of IEEE International Symposium on Requirements Engineering}",
	doi           = "10.1109/ISRE.1993.324845",
	isbn          = "0-8186-3120-1",
	pages         = "277--280",
	publisher     = "{IEEE}",
	title         = "{The role of policy in requirements definition}",
	year          = 1993,
}