1982-9949 1982-9949 S1982-99492016000100061 10.17058/rea.v24i1.6986 Brazil 00 04 2016 00 04 2016 24 1 61 81

39 138 138 837-66 23 1 1 220-44 10 87 87 90 226 226 673-94 3 5 5 59-89 13 39 39 1237-260 20 2 2 71-99 28 67-80