1981-0431 1981-0431 S1981-04312015000200425 10.2015/lcv21n45.0010 Brazil 00 05 2015 00 05 2015 21 45 425 443

28 100 100 965-87 21 55 55 30-41 23 02 02 279-301 28 100 100 1231-255