1. Engineering Department, State University of Pará, Belém, PA, Brazil, --- Select a Country ---
2. National Institute for Deaf Education, Rua das Laranjeiras, 232, Rio de Janeiro, RJ, Brazil, --- Select a Country ---
3. Department of Informatics, Federal University of Paraná, Curitiba, PR, Brazil, --- Select a Country ---
4. Informatics Department, Federal University of Technology, Ponta Grossa, PR, Brazil, --- Select a Country ---