Buitrón-Sánchez, Blanca E., Emilio Almázan-Vázquez, and Daniel Vachard. “Middle Permian Crinoids (Echinodermata, Crinoidea) from Cerros Los Monos, Caborca, Sonora, Mexico and Paleogeographic Considerations”. Revista Mexicana de Ciencias Geológicas 24, no. 3 (September 4, 2015): 344–353. Accessed April 13, 2025. https://rmcg.geociencias.unam.mx/index.php/rmcg/article/view/88.