Physicochemical or geochemical

• Farnfield, H. R., Marcilla, A. L., Ward, N. I., (2012), Arsenic speciation and trace element analysis of the volcanic río Agrio and the geothermal waters of Copahue, Argentina, Science of the Total Environment, 433, 371-378, 10.1016/j.scitotenv.2012.05.098