1. A. Abele, R. Johansson, H. Lönn, Y. Papadopoulos, M.-O. Reiser, D. Servat, M. Törngren, M. Weber, The CVM framework – a prototype tool for compositional variability management, in: Proc. of the 4th International Workshop on Variability Modelling of Software-intensive Systems (VaMoS 2010), Linz, Austria, ICB-Research Report No. 37, University of Duisburg-Essen, 2010, pp. 101–105.
2. N. Altintas, S. Cetin, Managing large scale reuse across multiple software product lines, in: Proc. of the 10th International Conference on Software Reuse (ICSR ’08), Springer, 2008, pp. 166–177.
3. H. Arboleda, R. Casallas, J.-C. Royer, Dealing with fine-grained configurations in model-driven SPLs, in: Proc. of the 13th International Software Product Line Conference (SPLC ’09), San Francisco, CA, USA, Carnegie Mellon University, Pittsburgh, PA, USA, 2009, pp. 1–10.
4. M. Aoyama, Continuous and discontinuous software evolution: aspects of software evolution across multiple product lines, in: Proc. of the 4th International Workshop on Principles of Software Evolution (IWPSE ‘01), ACM, 2001, pp. 87–90.
5. E. Babbie, Survey Research Methods, Wadsworth, 1990.