@inproceedings{RE-1991-HansenR,
	author        = "Detlef Hansen and Christian Roth",
	booktitle     = "{Proceedings of the Workshop on Requirements Engineering: Structured Analysis and Related Approaches}",
	isbn          = "3-540-54025-3",
	pages         = "67--85",
	publisher     = "{Springer-Verlag}",
	series        = "{Informatik-Fachberichte}",
	title         = "{Requirements Engineering bei der Techniker Krankenkasse: Ein Erfahrungsbericht}",
	volume        = 273,
	year          = 1991,
}