"IU F. Ponomarenko" . "I︠U︡riĭ" . "Iu" . "Iu F. Ponomarenko" . "Ponomarenko"@en . "I︠U︡"@en . "Пономаренко" . "Filippovich" . "Ю." . "I︠U︡riĭ Filippovich Ponomarenko" . "I︠U︡ F. Ponomarenko"@en . . . "Ю. Ф. Пономаренко" . "I︠U︡. F. Ponomarenko"@en-US . . "Ponomarenko, I︠U︡. F. (I︠U︡riĭ Filippovich)" . "Ф." . "IU" . "F."@en . . .