1. Bertolino, A., Fantechi, A., Gnesi, S., Lami, G., Maccari, A.: Use Case Description of Requirements for Product Lines, REPL 2002, Essen, Germany, Avaya Labs Tech. Rep. ALR- 2002-033 (September 2002)
2. Bertolino, A., Gnesi, S.: Use Case-based Testing of Product Lines. In: Proc. ESEC/FSE 2003, pp. 355–358. ACM Press, New York (2003)
3. Café project homepage at: http://www.extra.research.philips.com/euprojects/cafe/
4. SEI Series in Software Engineering;P.C. Clements,2001
5. Cockburn, A.: Writing Effective Use Cases. Addison-Wesley, Reading (2001)