1Ramon Chase, Ming Tang. The quest for single stage earth-to-orbit: TAV, NAS, DC-X and X- 33, accomplishments, deficiencies, and why they did not fly. AIAA 2002-5143
2Chase R L, Tang M H. A history of the NASP program from the formulation of the Joint Program Office to the termination of the HySTP scramjet performance demonstration program. AIAA-95-6031
