J. C. Rojas, C. Vandecasteele: Influence of mining activities in the North of Potosi, Bolivia on the water quality of the Chayanta River, and its consequences. In: Environmental monitoring and assessment. Band 132, Nummer 1–3, September 2007, S. 321–330, doi:10.1007/s10661-006-9536-7, PMID 17171242.
J. C. Rojas, C. Vandecasteele: Influence of mining activities in the North of Potosi, Bolivia on the water quality of the Chayanta River, and its consequences. In: Environmental monitoring and assessment. Band 132, Nummer 1–3, September 2007, S. 321–330, doi:10.1007/s10661-006-9536-7, PMID 17171242.