@inproceedings{REFSQ-2007-BirkH,
	author        = "Andreas Birk and Gerald Heller",
	booktitle     = "{Proceedings of the 13th International Working Conference on Requirements Engineering: Foundation for Software Quality}",
	doi           = "10.1007/978-3-540-73031-6_22",
	isbn          = "978-3-540-73030-9",
	pages         = "300--305",
	publisher     = "{Springer International Publishing}",
	series        = "{Lecture Notes in Computer Science}",
	title         = "{Challenges for Requirements Engineering and Management in Software Product Line Development}",
	volume        = 4542,
	year          = 2007,
}