Osprey Fleet." Rotor & Wing Magazine, 1 January 2010. "Remote Guardian System (RGS) (United States), Guns - Integral and mounted." Jane's Information Group
October 1980. Volume 44. Number 3, pp. 128–134 Parker, Danny S. To Win The Winter Sky: The Air War Over the Ardennes, 1944-1945. Da Capo Press, 1998. ISBN 0-938289-35-7
Indian Air Force (IAF) Myasishchev M-4-2 adapted from the M-4 bomber Myasishchev 3MS-2 adapted from the 3M bomber Tu-16N (and Tu-16Z with wing-to-wing system)