Who completed Prokofiev's Cello Concertino with a Russian composer born in 1904?
Cello Concertino (Prokofiev): Sergei Prokofiev's Cello Concertino in G minor, Op. Cello Concertino (Prokofiev):  132 was left incomplete at the composer's death in 1953. Cello Concertino (Prokofiev):  It was completed by Mstislav Rostropovich and Dmitry Kabalevsky. Dmitry Kabalevsky: Dmitry Borisovich Kabalevsky (Russian: Дми́трий Бори́сович Кабале́вский ; 30 December [O.S. 17 December] 1904 14 February 1987) was a Russian composer.
Mstislav Rostropovich