E. Piveta, and L. Zancanella. Third Latin American Conference on Pattern Languages of Programming (SugarLoafPLOP 2003), (2003)http://www.cin.ufpe.br/~sugarloafplop/articles/wp/PivetaFinalCopy.pdf.
E. Piveta, and L. Zancanella. International Conference on Computer Science, Software Engineering,
Information Technology, e-Bussiness and Applications (CSITeA'03), (2003)