1. Universidade Católica de Brasília, Brazil
2. Department of Computing and Mathematics, Faculty of Philosophy, Sciences, and Literatures in Ribeirão Preto, Universidade de São Paulo, São Paulo, Brazil
3. Institute of Mathematics and Computer Science, University of São Paulo (USP) São Carlos, São Paulo, Brazil
4. FGV/EPPG School of Public Policy and Government, Getulio Vargas Foundation, Brasilia, Brazil