1981-0431 1981-0431 S1981-04312015000300727 10.2015/lcv21n46.727 Brazil Brazil 00 09 2015 00 09 2015 21 46 727 749

16 1 1 87-102 26 2 2 157-68 14 27 27 271-87 13 13 5-24 21 73 73 209-44