1809-3876 1809-3876 S1809-38762016000401556 10.23925/1809-3876.2016v14i4p1556 Brazil 00 12 2016 00 12 2016 14 4 1556 1575

2 2/3 2/3 88-104 26 52 52 429-48 11 1 1 13-31 10 2 2 329-42 15 12 12 599-613 27 2 2 5-27 97 97 37 4 4 543-61