@inproceedings{RE-2001-NelsonCA,
	author        = "Maria Augusta V. Nelson and Donald D. Cowan and Paulo S. C. Alencar",
	booktitle     = "{Proceedings of the Fifth International Symposium on Requirements Engineering}",
	doi           = "10.1109/ISRE.2001.948597",
	isbn          = "0-7695-1125-2",
	pages         = "306--307",
	publisher     = "{IEEE Computer Society}",
	title         = "{Geographic Problem Frames}",
	year          = 2001,
}