@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} }