@inproceedings{HCI-EI-1999-Freitag,
	author        = "Regine Freitag",
	booktitle     = "{Proceedings of the Eighth International Conference on Human-Computer Interaction. Volume 1: Ergonomics and User Interfaces}",
	isbn          = "0-8058-3391-9",
	pages         = "1209--1212",
	publisher     = "{Lawrence Erlbaum}",
	title         = "{The Symbiosis of Scenarios and Prototypes in Usability Requirements Engineering}",
	year          = 1999,
}