1. Alonso J. (2008). “Program highlights Fundamental Aeronautics Program.” NASA Fund. Aero. Prog. Ann. Meet. Atlanta.
2. Ground tests confirm the promise of hypersonic propulsion;Anderson G. Y.;Aerosp. Am.,1987
3. Andrews E. H. and Mackley E. A. (1994). “NASA’s Hypersonic Research Engine Project—A review.” Rep. NASA TM–107759 NASA Hampton VA.
4. Bowles M. D. (2010). “The Apollo of aeronautics NASA’s Aircraft Energy Efficiency Program 1973–1987.” Rep. SP—2009-574 NASA Washington DC.