@inproceedings{RE-1993-HarrisonB,
	author        = "Michael D. Harrison and Philip J. Barnard",
	booktitle     = "{Proceedings of IEEE International Symposium on Requirements Engineering}",
	doi           = "10.1109/ISRE.1993.324837",
	isbn          = "0-8186-3120-1",
	pages         = "50--54",
	publisher     = "{IEEE}",
	title         = "{On defining requirements for interaction}",
	year          = 1993,
}