1809-3876 1809-3876 S1809-38762018000100139 10.23925/1809-3876.2018v16i1p139-168 Brazil Brasil 00 03 2018 00 03 2018 16 1 139 168

21 45-220 24 74S 74S 35 1 1 85-96 23 1 1 17-40