Hayrapetyan, A.; Bolotov, S.; Gevorgyan, G.; Gabrielyan, B. INVESTIGATION OF DIFFERENT ENVIRONMENTAL FACTORS ROLE IN THE FORMATION OF ZOOPLANKTON COMMUNITY IN THE ARPA RIVER (ARMENIA) AND ITS MAIN TRIBUTARIES. Proc. YSU B: Chem. Biol. Sci. 2016, 50, 53-59.