0102-7735 0102-7735 S0102-77352017000300101 10.21680/1981-1802.2017v55n45ID12747 Brazil 00 09 2017 00 09 2017 55 45 101 126

21 71 71 79-115 18 18 35-40 2 3 3 5 4 4 3 7 1-2 1-2 124-34 5 8 1 1 15-32