1982-9949 1982-9949 S1982-99492020000300249 10.17058/rea.v28i3.13955 Brazil Brazil Brazil 00 09 2020 00 09 2020 28 3 249 254 1991 4 7 7 66-81 2011 2009 1992 7 2000 2006 2017 2016 4 1 1 144-53