1. COLUNI, Federal University of Viçosa, MG, Brazil
2. IFIMUP-IN, University of Porto, Portugal
3. DFA, UEC, FCUP, Assistant Professor, Department of Physics and Astronomy, Faculty of Sciences, University of Porto - Portugal; psimeao@fc.up.pt
4. IFRJ - Rio de Janeiro, Brazil
5. Oswaldo Cruz Institute/Program EBS - Rio de Janeiro, Brazil