Buitrón-Sánchez, B. E.; Almázan-Vázquez, E.; Vachard, D. Middle Permian Crinoids (Echinodermata, Crinoidea) from Cerros Los Monos, Caborca, Sonora, Mexico and Paleogeographic Considerations. revmexcg 2015, 24, 344-353.