2238-121X 2238-121X S2238-121X2015000300049 10.15600/2238-121X/comunicacoes.v22n3p49-60 Brasil Brasil 00 00 2015 00 00 2015 22 3 49 60

56 56 388-411 4.ª ed 2. ed XXI 54 54 9-18 25 50 50 607-34