Barros, Omar Neto Fernandes, Luiza Saito, and Paulo Noffis. “Concept of Time: Relations Between Alteration Degrees and Chronosequence and the Geomorphological Surfaces”. Semina: Ciências Exatas e Tecnológicas 21, no. 4 (December 15, 2004): 67–76. Accessed May 18, 2024. https://ojs.uel.br/revistas/uel/index.php/semexatas/article/view/3014.