Pérez-Crespo, V.A. et al. 2018. Paleoenvironment of the Central Depression of Chiapas, based on stable carbon and oxygen isotopes. Revista Mexicana de Ciencias Geológicas. 32, 2 (Jan. 2018), 273–282. DOI:https://doi.org/10.22201/cgeo.20072902e.2015.2.580.