Acknowledgments
This study was supported by the National Council for Scientific and
Technological Development (CNPq), the Coordination for the Improvement
of Higher Level Education Personnel (CAPES) and the State of Minas
Gerais Research Foundation (FAPEMIG), Brazil, and the PrĂ³-reitoria
Pesquisa of the Universidade Federal Minas Gerais, Brazil. ALPR is a
fellow of CNPq.