Jelaskan Su-34: dari Gryazev-Shipunov GSh-301

Yefim Gordon. Yakovlev Yak-36, Yak-38 & Yak-41: / The Soviet 'Jump Jets' / Translation by Dmitriy Komissarov. — Hinckley, England, UK: Midland Publishing, 2008. — P. 130—131. ISBN 978-1-85780-287-0