@inproceedings{RE-1997-Yu,
	author        = "Eric S. K. Yu",
	booktitle     = "{Proceedings of the Third International Symposium on Requirements Engineering}",
	doi           = "10.1109/ISRE.1997.566873",
	isbn          = "0-8186-7740-6",
	pages         = "226--235",
	publisher     = "{IEEE Computer Society}",
	title         = "{Towards Modeling and Reasoning Support for Early-Phase Requirements Engineering}",
	year          = 1997,
}