1. Chladek J (2017) Chelomei and Almaz. In: Outposts on the frontier: a fifty-year history of space stations. University of Nebraska Press, Lincoln Nebraska
2. Day DA (1994) The Von Braun paradigm. Space Times 33:12–15
3. Dunar AJ, Waring SP (1999) Power to explore: a history of Marshall Space Flight Center, 1960–1990. National Aeronautics and Space Administration, NASA History Office, Office of Policy and Plans, Washington, DC
4. Grimwood JM, Swenson LS, Brooks CG (1979) Chariots for Apollo: a history of manned lunar spacecraft. NASA. ISBN 0-486-46756-2. https://history.nasa.gov/SP-4205/contents.html. Accessed 20 Mar 2020
5. Hansen JR (1995) Spaceflight revolution: NASA Langley research center from sputnik to Apollo. NASA. NASA SP-4308. https://history.nasa.gov/SP-4308.pdf. Accessed 20 Mar 2020