2178-5201 2178-5201 S2178-52012016000200193 10.4025/actascieduc.v38i2.23610 Brazil Brazil 00 06 2016 00 06 2016 38 2 193 204

12 2 2 227-61 80 5 5 579-610 13 3 3 399-420 24 3 3 487-514 8 2 2 154-61 3 1 1 90-7