1809-3876 1809-3876 S1809-38762017000200429 10.23925/1809-3876.2017v15i2p429-454 Brazil Brazil 00 06 2017 00 06 2017 15 2 429 454

23 1 1 4-21 31 3 3 483-502 31 3 3 467-82 31 3 3 503-19 35 125 125 63-80