Juárez-Arriaga, Edgar, and Gustavo Murillo-Muñetón. 2020. “Stratigraphic Architecture, Depositional Environments and Geochronology of the Olinalá Formation (late Permian), Northeastern Guerrero, Mexico”. Revista Mexicana De Ciencias Geológicas 37 (3):179-96. https://doi.org/10.22201/cgeo.20072902e.2020.3.1576.