M. Bigalke, L. Schwab, S. Gygax, and A. Mestrot, “Soil Contamination with Trace Metals: Quantification, Speciation, and Source Identification: Highlights of Analytical Sciences in Switzerland”, Chimia, vol. 70, no. 12, p. 899, Dec. 2016, doi: 10.2533/chimia.2016.899.