Gevorgyan, G.A., et al. “ENVIRONMENTAL RISKS OF HEAVY METAL POLLUTION OF THE SOILS AROUND KAJARAN TOWN, ARMENIA”. Proceedings of the YSU B: Chemical and Biological Sciences, vol. 49, no. 2 (237), July 2015, pp. 50-55, doi:10.46991/PYSU:B/2015.49.2.050.