@inproceedings{RE-1997-Liu,
	author        = "Shaoying Liu",
	booktitle     = "{Proceedings of the Third International Symposium on Requirements Engineering}",
	doi           = "10.1109/ISRE.1997.566840",
	isbn          = "0-8186-7740-6",
	pages         = "41",
	publisher     = "{IEEE Computer Society}",
	title         = "{SOFL: A Formal Engineering Methodology for Industrial Applications}",
	year          = 1997,
}