The Petrotectónica and Biostratigraphy of the Sugar Group Sandstones of Southwest Ecuador. Revista Científica Ciencias Naturales y Ambientales, [S. l.], v. 5, n. 1, 2011. DOI: 10.53591/cna.v5i1.281. Disponível em: https://revistas.ug.edu.ec/index.php/cna/article/view/1692. Acesso em: 5 dec. 2025.