A. Moreira, J. Ara&\#250;jo, and I. Brito. SEKE '02: Proceedings of the 14th international conference on Software
engineering and knowledge engineering, page 167--174. New York, NY, USA, ACM Press, (2002)
M. Bertoa, and A. Vallecillo. Proceedings of the 6th ECOOP Workshop on Quantitative Approaches
in Object-Oriented Software Engineering (QAOOSE 2002), 1 (2):
128--144(November 2002)