0104-7043 0104-7043 S0104-70432014000200163 10.2014/jul.dezv23n42014 Brazil 00 12 2014 00 12 2014 23 42 163 172

14 61 61 60-78 24 3 3 679-712 16 2 2 20-31 18 32 32 2 2 2 46-71 14/15 14/15 286-86