@inproceedings{ICRE-1998-SommervilleSV,
	author        = "Ian Sommerville and Peter Sawyer and Stephen Viller",
	booktitle     = "{Proceedings of the Third International Conference on Requirements Engineering: Putting Requirements Engineering to Practice}",
	doi           = "10.1109/ICRE.1998.667811",
	isbn          = "0-8186-8356-2",
	pages         = "74--81",
	publisher     = "{IEEE Computer Society}",
	title         = "{Viewpoints for Requirements Elicitation: A Practical Approach}",
	year          = 1998,
}