1982-9949 1982-9949 S1982-99492016000200334 10.17058/rea.v24i2.3849 Brazil Brazil 00 05 2016 00 05 2016 24 2 334 354

98 98 85-90 1 19 19 46-58 36 129 129 547-71 9 16/17 16/17 24-35 14 3 3 323-37