1. Federal University of Mato Grosso (UFMT), Barra do Garças/MT, 78698-000, Brazil
2. Department of Informatics and Applied Mathematics (DIMAp), Federal University of Rio Grande do Norte (UFRN), Natal/RN, 59078-970, Brazil
3. LaTARC Research Lab, Federal Institute of Education, Science and Technology of Rio Grande do Norte (IFRN), Natal/RN, 59015-000, Brazil
4. Instituto de Telecomunicações, Aveiro, 3810-193, Portugal