1981-8106 1981-8106 S1981-81062017000200244 10.18675/1981-8106.vol27.n55.p244-261 Brazil Brazil 00 08 2017 00 08 2017 27 55 244 261

85 85 70-8 104 104 162-80 32 115 115 323-37 28 100 100 1.231-1.255 69 69 23 80 80 96-107