Fraga, N.C. 2014. Geogr. Opport. Temp., Londrina, v. 1, número especial, jul./dez. 2014. Geographia Opportuno Tempore. 1, 2 (nov. 2014), 572–575. DOI:https://doi.org/10.5433/got.2014.v1.20317.