@conference {berger2015germanse,
	title = {Variability Models in Large-Scale Systems: A Study and a Reverse-Engineering Technique},
	booktitle = {Software Engineering (SE)},
	year = {2015},
	attachments = {http://gsd.uwaterloo.ca/sites/default/files/german_se-conference_2015.pdf},
	author = {Thorsten Berger and Sarah Nadi}
}