1982-596x 1982-596x S1982-596x2016000200821 10.14393/REVEDFIL.issn.0102-6801.v30n60a2016-p821a858 Brazil 00 12 2016 00 12 2016 30 60 821 858

208 1.174-1.176 6 1 1 211-37 10 10 88-92 46 46 56-66 96 96