1982-9949 1982-9949 S1982-99492020000200132 10.17058/rea.v28i2.14364 Brazil Brazil 00 05 2020 00 05 2020 28 2 132 146

1981 2003 1 3 3 44-8 2018 11 26 26 339-50 2017 12 1 1 2007 2014 16 1 1 127-40 2009 2 1995 2014 2016 1 1 111-25 2012 2017 38 140 140 587-609 2015 31 55 55 145-66 2014 22 2 2 220-53 2011 35-61 2011 2003 2 37 37 2013 2007 2012 2019 10 1-14 UNIVERSIDADE FEDERAL DE VIÇOSA 2019