Batkhishig, B., B. Manzshir, B. Munkhtsengel, and T. Noriyoshi. “PCA Analysis of Soil Geochemical Data and Environmental Assessment of the Pre-Mining Shuteen Area, South Mongolia”. Mongolian Geoscientist, vol. 51, Dec. 2020, pp. 21-39, doi:10.5564/mgs.v51i0.1459.