1981-0431 1981-0431 S1981-04312015000100159 10.2015/lcv21n44.010 Brazil 00 04 2015 00 04 2015 21 44 159 177

18 43 43 26-37 14 29 29 369-85 47 47 19-33 33 120 120 727-44 2 2 2 93-108 38 38 113-34 13 1 1 185-206 39 1 1 15-30