1982-9949 1982-9949 S1982-99492014000200347 10.17058/rea.v22i2.0347 Brazil 00 12 2014 00 12 2014 22 2 347 370

14 30 30 5 12 12 30 1 1 73-89 1 14 14 186-91 12 2 2 12 36 36 21 73 73 12 25 25