C. H. Stevens, F. G. Poole, F. G. Poole, R. Amaya-Martínez, and R. Amaya-Martínez, “Late Paleozoic fusulinids from Sonora, México: Importance for interpretation of depositional settings, biogeography, and paleotectonics”, revmexcg, vol. 31, no. 1, Feb. 2015.