Pal, S., Terrel, D.J. y García R., M. 1976. Radioactivity and heat sources in the Central depression of Chiapas state, Mexico. Geofísica Internacional. 16, 3 (jul. 1976), 185–195. DOI:https://doi.org/10.22201/igeof.2954436xe.1976.16.3.1496.