Petrosyan, V.A. “DISTRIBUTION AND MIGRATION OF LEAD IN THE WATER–BOTTOM SEDIMENT SYSTEM OF THE HRAZDAN RIVER”. Proceedings of the YSU B: Chemical and Biological Sciences, vol. 50, no. 1 (239), Mar. 2016, pp. 19-24, doi:10.46991/PYSU:B/2016.50.1.019.