Affiliation: | 1. Universidade Federal do Rio de Janeiro, COPPE, Systems Engineering and Computer Science Program, Caixa Postal 68511, 21941-972, Rio de Janeiro, RJ, Brazil;2. Universidade Federal Fluminense–UFF, Department of Computer Science, Institute of Computation, Rua Passo da Pátria 156, São Domingos, Niteroi, RJ, 24210-240, Brazil |