@conference {berger2015feature, title = {What is a Feature? A Qualitative Study of Features in Industrial Software Product Lines}, booktitle = {19th International Software Product Line Conference (SPLC)}, year = {2015}, attachments = {http://gsd.uwaterloo.ca/sites/default/files/berger-2015-featurestudy.pdf , http://gsd.uwaterloo.ca/sites/default/files/berger-2015-featurestudy-slides.pdf}, author = {Thorsten Berger and Daniela Lettner and Julia Rubin and Paul Gr{\"u}nbacher and Adeline Silva and Becker, Martin and Chechik, Marsha and Krzysztof Czarnecki} }