Oliveira Junior, Edson, Jose C. Maldonado, and Itana M. S. Gimenes.
" Empirical Validation of Complexity and Extensibility Metrics for Software Product Line Architectures." <em>Proceedings of the 4th Brazilian Symposium on Software Components, Architectures, and Reuse,
Salvador/BA, 2010</em>. SBC, 2010,  
pp.31-40.