This composer's bio can be found at:
https://translate.googleusercontent.com ... 8aK8pLF3mgThere are three viola concertos listed (dated 1943-44, 1952, and 1953). My best guess is that the G major piece is the second of these (as it was uncommon for any Soviet-era work to see publication in the same exact year of its composition).
Boris Ivanovich ANTYUFEYEV (ANTYUFEEV, ANTIUFEEV)Viola Concerto no. 1, op. 45 (1943-44) (piano red.)
Antyufeyev - Viola Concerto no. 1, op. 45 (1943-44) (piano red.).pdf
Viola Concerto (in G major) (1953 pub.) (piano red.) (nms)
Antyufeyev - Viola Concerto (in G major) (1953 pub.) (piano red.).pdf
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