Tassi, F., Capaccioni, B., Capecchiacci, F., & Vaselli, O. (2009). Non-methane Volatile Organic Compounds (VOCs) at El Chichón volcano (Chiapas, México): Geochemical features, origin and behavior. Geofísica Internacional, 48(1), 85–95. https://doi.org/10.22201/igeof.00167169p.2009.48.1.101