“INVESTIGATIONS OF FORMATION OF PHYTOPLANKTON COMMUNITY IN THE ARPA RIVER (ARMENIA) AND ITS MAIN TRIBUTARIES”, Proc. YSU B: Chem. Biol. Sci., vol. 53, no. 1 (248), pp. 46–52, Apr. 2019, doi: 10.46991/PYSUB.2019.53.1.046.