Balabanova, Biljana, Trajce Stafilov, and Robert Šajn. 2015. “Lithological Distribution of Rare Earth Elements in Automorphic and Alluvial Soils in the Bregalnica River Basin”. Macedonian Journal of Chemistry and Chemical Engineering 34 (1):201-12. https://doi.org/10.20450/mjcce.2015.574.