1982-9949 1982-9949 S1982-99492016000200137 10.17058/rea.v24i2.4848 Brasil Brasil Brasil 00 05 2016 00 05 2016 24 2 137 155

17 40 4 4 26 93 93 1273-288 61 4 4 988-90 17 1 1 135-45