1981-8106 1981-8106 S1981-81062017000200389 10.18675/1981-8106.vol27.n55.p389-407 Brazil Brazil 00 08 2017 00 08 2017 27 55 389 407

18 1 1 69-80 9 1 1 1-20 1 11 11 17-32 8 8 7-22 1 161-80 12 34 34 94-181 19 31 31 139-46