1. J. Rohde, Narrative and organization, in: Proceedings of IMAGINE '09: Ideas at Work, American Astronautical Society, Houston, TX, December 2–3, 2009.
2. B. Sherwood, Integrating national space visions, IAC-06-E3.1.A.06, in: Proceedings of the International Astronautical Congress, Valencia, Spain, October 2006.
3. The Mars Project (Das Marsprojekt);von Braun,1991
4. W. von Braun, et al., Man will conquer space soon, Colliers, March 22, 1952, pp. 22–35, 65–71; Man on the Moon, Colliers, October 18, 1952, pp. 51–56; More about man on the Moon, Colliers, October 25, 1952; pp. 38–46; World's first space suit, Colliers, February 28, 1953, pp. 40–48; More about man's survival in space, March 7, 1953, pp. 56–63; How man will meet emergency in space travel, Colliers, March 14, 1953; pp. 38–44; The baby space station: First step in the conquest of space, Colliers, June 27, 1953, pp. 33–40; Can we get to mars?/Is there life on Mars?, Colliers, April 30, 1954, pp. 21–29.
5. NASA, Report of the 90-day study on human exploration of the Moon and Mars, Washington, DC, November 1989.