1. The cutting edge: a half century of US fighter aircraft R&D;Lorell,1998
2. To find, and not to yield-how advances in information and firepower can transform theater warfare;Ochmanek,1998
3. J. Boatman, USA planned stealthy UAV to replace SR-71, Jane’s Defense Weekly, December 17, 1994.
4. Air force UAVs: the secret history;Ehrhard,2010
5. Technology and the American way of war since 1945;Mahnken,2008