@inproceedings{RE-1991-PfeifferKHG,
	author        = "M. Pfeiffer and Jürgen Kazmeier and Rudolf Haggenmüller and R. Günther",
	booktitle     = "{Proceedings of the Workshop on Requirements Engineering: Structured Analysis and Related Approaches}",
	isbn          = "3-540-54025-3",
	pages         = "160--177",
	publisher     = "{Springer-Verlag}",
	series        = "{Informatik-Fachberichte}",
	title         = "{Die Engineering-Sprache GRAPES}",
	volume        = 273,
	year          = 1991,
}