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Valdemar Vicente Graciano NetoFederal University of Goiás, Goiânia, Brazil valdemarneto at ufg dot br
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Fábio BassoFederal University of Pampa, Alegrete, Brazil fabiobasso at unipampa dot edu dot br
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Abdul AlshareefKing Saud University, Riyadh, Saudi Arabia aah.shareef at gmail dot com
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Valdemar Vicente Graciano NetoFederal University of Goiás, Goiânia, Brazil valdemarneto at ufg dot br
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Elisa Yumi NakagawaUniversity of São Paulo, São Carlos, Brazil elisa at icmc dot usp dot br
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Bernard ZeiglerUniversity of Arizona, Tucson, USA zeigler at ece dot arizona dot edu
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