1981-0431 1981-0431 S1981-04312015000200445 10.2015/lcv21n45.0011 Brazil 00 05 2015 00 05 2015 21 45 445 466

5 139-48 1 826-46 13 126-41 6 1-19 42 700-15 39 7-23 13 392-410 42 716-37 22 173-88 39 337/2-33357 17 13-24