“Morphology and Formation of Glassy Volcanic Ash from the August 12-15, 1991 Eruption of Hudson Volcano, Chile”.
Latin American Journal of Sedimentology and Basin Analysis 12, no. 1 (March 31, 2021): 3–21. Accessed July 9, 2025.
http://gananventas.com/lajsba/article/view/73.