1982-9949 1982-9949 S1982-99492016000300246 10.17058/rea.v24i3.5420 Brazil Brazil Brazil 00 12 2016 00 12 2016 24 3 246 260

21 52 52 99-112 14 1 1 41-65 6 151-63 32 1 1 98-114 16 2 2 335-42 19 2 2 4-27 9 16 16 161-77