Златанов, Б.В. “New Subspecies of Eumerus Aristatus Peck, 1969 (Diptera, Syrphidae) from Karabas Mountains (Eastern Kazakhstan)”. Fundamental and Experimental Biology, vol. 111, no. 3, Sept. 2023, pp. 68-72, doi:10.31489/2023bmg3/68-72.