1982-9949 1982-9949 S1982-99492016000200156 10.17058/rea.v24i2.5681 Brazil Brazil 00 05 2016 00 05 2016 24 2 156 176

11 1 1 33-9 20 3 3 8 2 2 109-23 12 1 1 89-96 24 1 1 112-31 12 3 3 164-214 9 2 2 147-57 13 3 3 333-52 3 1-14 3 853-76 18 525-43