Physicochemical or geochemical

• Rubio, C., Rodríguez, I., Jaudenes, J. R., Gutiérrez, A. J., Paz, S., Burgos, A., Hardisson, A., Revert, C., (2020), Fluoride levels in supply water from a volcanic area in the Macaronesia region., Environmental Science and Pollution Research, 27, 11587–11595, 10.1007/s11356-020-07702-x