2238-121X 2238-121X S2238-121X2016000300007 10.15600/2238-121X/comunicacoes.v23n3p7-20 Brazil Brazil Brazil Brazil Brazil 00 12 2016 00 12 2016 23 3 7 20

18 18 21 1 1 07-15 6 3 3 34 30 30 10-7 47 47 45 45 57 57