1982-9949 1982-9949 S1982-99492016000200177 10.17058/rea.v24i2.5683 Brasil 00 05 2016 00 05 2016 24 2 177 196

28 100 100 36 36 25 3 3 1 2 2 1 2 2 150-67 13 26 26 16 16 27 1 1