1982-9949 1982-9949 S1982-99492020000200293 10.17058/rea.v28i2.14499 Brasil Brasil 00 05 2020 00 05 2020 28 2 293 303 2012 137-58 2014 2017 19 4 4 669-90 2017 49 672-80 2013 36 2 2 144-55 2017 19 4 4 585-9 2008 2007 2013 2000 328-35 2013 2004