1. Institute of Mathematical and Computer Sciences, University of São Paulo, São Carlos, São Paulo, Brazil
2. Institute of Biosciences, Letters and Exact Sciences, São Paulo State University, São José do Rio Preto, São Paulo, Brazil
3. Faculty of Architecture and Engineering, Mato Grosso State University, Cáceres, Mato Grosso, Brazil
4. Computing Department, Federal University of São Carlos, São Carlos, São Paulo, Brazil