1676-2592 1676-2592 S1676-25922018000400979 10.20396/etd.v20i4.8649944 Brazil Brazil 00 10 2018 00 10 2018 20 4 979 996

4 23 1-2 1-2 2 10 19 19 19 19 19 2 2 04-27 34 2 2 147-56 16