1982-9949 1982-9949 S1982-99492016000300162 10.17058/rea.v24i3.2902 Brazil Brazil 00 12 2016 00 12 2016 24 3 162 188

27 3 3 02 1 1 239-65 24 24 105-25 33 1 1 77-100 35 1 1 103-09