Sukhoi Su-11 Development of the Su-9.  Soviet Union Soviet Anti-Air Defense 894th Fighter Aviation Regiment, Ozernoye, Ukraine, 1959-1979.
Sukhoj Su-11 Videreudvikling af Su-9.  USSR Sovjetunionens luftforsvar (PVO) 894th Fighter Aviation Regiment, Ozernoye, Ukraine, 1959-1979.