Fraga, N. C. (2014). Geogr. Opport. Temp., Londrina, v. 1, n. 2, jul./dez. 2014. Geographia Opportuno Tempore, 1(3), 100–101. Recuperado de https://ojs.uel.br/revistas/uel/index.php/Geographia/article/view/20363