Physicochemical or geochemical

• Aguilera, C., Viteri, M., Seqqat, R., Ayala Navarrette, L., Toulkeridis, T., Ruano, A., Torres Arias, M., (2018), Biological impact of exposure to extremely fine-grained volcanic ash, Journal of Nanotechnology, 2018, 7543859, 10.1155/2018/7543859