Pupo, Daniel Vicente, and Sibelle Trevisan Disaró. “Characterization of Guaraguaçú River (Paraná, Brazil) Based on the Distribution of Foraminiferal and Thecamoebian Assemblages and Sedimentological Analysis”. Anuário Do Instituto De Geociências, vol. 29, no. 1, Jan. 2006, pp. 434-5, doi:10.11137/2006_1_434-435.