B. E. Buitrón-Sánchez, E. Almázan-Vázquez, and D. Vachard, “Middle Permian crinoids (Echinodermata, Crinoidea) from Cerros Los Monos, Caborca, Sonora, Mexico and paleogeographic considerations”, revmexcg, vol. 24, no. 3, pp. 344–353, Sep. 2015.