@article {385, title = {Feature-to-Code Mapping in Two Large Product Lines}, year = {2010}, institution = {Department of Computer Science, University of Leipzig}, type = {Technical Report}, address = {Leipzig}, attachments = {http://gsd.uwaterloo.ca/sites/default/files/2010-TR-presence_conditions.pdf}, author = {Thorsten Berger and She, Steven and Krzysztof Czarnecki and W{\k a}sowski, Andrzej} }