1981-8106 1981-8106 S1981-81062016000300528 10.18675/1981-8106.vol26.n53.p528-549 Brasil Brazil 00 12 2016 00 12 2016 26 53 528 594

32 1 1 3 5 5 7-25 18 52 52 101-19 3-8 34 93 93 207-24 12 24 24 39-55 9 17 17 64-83 6 2 2 373-402