J. R. Vidal-Solano, F. A. Paz-Moreno, A. Demant, and M. López-Martínez, “Peralkaline ignimbrites of middle Miocene age in central Sonora: review of the stratigraphy and significance of Tertiary volcanism”, revmexcg, vol. 24, no. 1, pp. 47–67, Feb. 2018.