↑Siebert, Lee; Alvarado, Guillermo E.; Vallance, James W.; van Wyk de Vries, Benjamin (2006). „Large-volume volcanic edifice failures in Central America and associated hazards“. 412: 1–26. doi:10.1130/2006.2412(01). Наводот journal бара |journal= (help)
↑MacVean, Charles; Schuster, Jack C. (1981). „Altitudinal Distribution of Passalid Beetles (Coleoptera, Passalidae) and Pleistocene Dispersal on the Volcanic Chain of Northern Central America“. Biotropica. 13 (1): 29. doi:10.2307/2387868. ISSN0006-3606.
↑Rose, William I. (1987). „Santa María, Guatemala: Bimodal soda-rich calc-alkalic stratovolcano“. Journal of Volcanology and Geothermal Research. 33 (1–3): 109–129. doi:10.1016/0377-0273(87)90056-4. ISSN0377-0273.