1982-9949 1982-9949 S1982-99492014000200068 10.17058/rea.v22i2.0068 Brazil 00 12 2014 00 12 2014 22 2 68 93

7 5 5 2 3 3 21-6 9 26 26 1-15 22 77 77 28-48 25 89 89 21 75 75 104 104 605-31