Fraga, N. C. (2015). Geogr. Opport. Temp., Londrina, v. 2, n. 1, jan./jun. 2014. Geographia Opportuno Tempore, 2(1), 129–130. Recuperado de https://ojs.uel.br/revistas/uel/index.php/Geographia/article/view/23835