1676-2592 1676-2592 S1676-25922015000300633 10.20396/etd.v17i3.8638223 Brazil Brazil 00 12 2015 00 12 2015 17 3 633 652

14 6 6 723-44 9 46 46 33-48 12 34 34 7-46 23 78 78 15-35