found: His Rostafenster, 1967:t.p. (Wiktor Duwakin) jkt. (Literaturhistoriker, wissenschaftlicher Mitarbeiter der Moskauer Universität)
found: LC data base, 6-13-90(hdg.: Duvakin, V. D.; usage: Wiktor Duwakin)
found: Radostʹ, masterom kovannai︠a︡, 1964:t.p. (V. Duvakin) colophon (Duvakin Viktor Dmitrievich)
found: Anna Akhmatova v zapisi︠a︡kh Duvakina, 1999:p. 27 (V. D. Duvakin, 1909-1982)
found: Ustnai︠a︡ istorii︠a︡ website, September 30, 2019(Duvakin Viktor Dmitrievich; born February 28, 1909; died June 21, 1982)
