1676-2592 1676-2592 S1676-25922015000300514 10.20396/etd.v17i3.8638238 Brazil 00 12 2015 00 12 2015 17 3 514 522

18 3 3 57-66 21 159-69 40 140 140 629-48 92 232 232 663-77 25 3 3 465-78 18 66 66 09-28