@inproceedings{SPLC-2009-KastnerARRBS,
	author        = "Christian Kästner and Sven Apel and Syed Saif ur Rahman and Marko Rosenmüller and Don S. Batory and Gunter Saake",
	booktitle     = "{Proceedings of the 13th International Software Product Line Conference}",
	doi           = "10.1145/1753235.1753261",
	pages         = "181--190",
	publisher     = "{ACM}",
	series        = "{ACM International Conference Proceeding Series}",
	title         = "{On the impact of the optional feature problem: analysis and case studies}",
	volume        = 446,
	year          = 2009,
}