1982-9949 1982-9949 S1982-99492016000100007 10.17058/rea.v24i1.7045 Brazil Brazil 00 04 2016 00 04 2016 24 1 7 25

9 575-85 5 06 06 3 1 1 75-92 5 73-92 19 57 57 11 3 3 288-98 28 149-74 27 92 92 1-212 21 21 09 09