1676-2592 1676-2592 S1676-25922016000300580 10.20396/etd.v18i3.8646053 Brazil 00 09 2016 00 09 2016 18 3 580 595

41 03 03 399-412 25 06 06 776-85 16 02 02 193-200 56 01 01 116-30