1. Institute of Mathematical and Computer Sciences, University of São Paulo, São Carlos, São Paulo, Brazil
2. Johann Bernoulli Institute for Mathematics and Computer Science, University of Groningen, Groningen, Netherlands
3. Instituto de Pesquisas Eldorado, Campinas, São Paulo, Brazil
4. Federal Institute of São Paulo, Araraquara, São Paulo, Brazil
5. School of Computing and Information Sciences, Florida International University, Miami, FL, USA