1. Weiss, D., Lai, C.T.R.: Software Product-Line Engineering. A Family-Based Software Development Process. Addison-Wesley (1999)
2. Homepage of PuLSETM, http://www.iese.fhg.de/pulse/
3. Homepage of the PoLITe project, http://www.polite-project.de/
4. Homepage of the ViSEK project (in German), http://www.visek.de/
5. Muthig, D., Anastasopoulos, M., Laqua, R., Patzke, S.K.T.: Technology Dimensions of Product Line Implementation Approaches State-of-the-art and State-of-the-practice Survey, IESE-Report No. 051.02/E (September 2002)