Physicochemical or geochemical, Toxicological

• Hillman, S. E., Horwell, C. J., Densmore, A., Damby, D. E., Fubini, B., Ishimine, Y., Tomatis, M., (2012), Sakurajima volcano: a physico-chemical study of the health consequences of long-term exposure to volcanic ash, Bulletin of Volcanology, 74, 913–930, 10.1007/s00445-012-0575-3