1982-9949 1982-9949 S1982-99492015000200295 10.17058/rea.v23i2.6076 Brazil Brazil Brazil Brazil 00 08 2015 00 08 2015 23 2 295 317

4 1 1 1-25 10 73-90 5 9 9 98-110 10 1 1 101-10 9 2 2 137-75 5 2 2 175-83