1. An evolvable space telescope for future astronomical missions;Polidan,2014
2. An evolvable space telescope for future astronomical missions 2015 update,;Polidan,2015
3. Innovative telescope architectures for future large space observatories
4. Collier's articles on the conquest of space (1952-1954) - Space Stuff, http://www.rmastri.it/spacestuff/wernher-von-braun/colliers-articles-on-the-conquest-of-space-1952-1954/
5. Early Steps in the Realization of the Space Station,;Von Braun,1953