V. A. Pérez-Crespo, G. Carbot-Chanona, P. Morales-Puente, E. Cienfuegos-Alvarado, and F. J. Otero, “Paleoenvironment of the Central Depression of Chiapas, based on stable carbon and oxygen isotopes”, revmexcg, vol. 32, no. 2, pp. 273–282, Jan. 2018.