First Author:   Mathias S Tessmann Brazilian Institute of Education, Development and Research - IDP mathias.tessmann@idp.edu.br   Brasília, 70700620, Brasil   61996977330(Phone) 61996977330(Fax) Second Author: Marco A Kerbeg Bank of Brazil marcokerbeg1006@gmail.com         Third Author: Gustavo C Haase Bank of Brazil gustavo.haase@gmail.com   Brasilia, 70073-901, Brasil       Fourth Author: Thiago T Lourenço Bank of Brazil thiagotlourenco@gmail.com         http://