id: 50250646 dt: j an: 50250646 au: Schaefer, Ina; Hähnle, Reiner ti: Formal methods in software product line engineering so: IEEE Computer 44, No. 2, 82-85 (2011). py: 2011 pu: la: EN cc: ut: ci: li: http://doi.ieeecomputersociety.org/10.1109/MC.2011.47