1. Entry into Planetary Atmospheres;ROBERTS;Astronautics and Aeronautics,1964
2. BOOBAR, M. G., Some Considerations for Manned Entry and Landing, AIAA/AAS Stepping Stones to Mars Meeting (American Institute of Aeronautics and Astronautics), p. 357, New York (March 1966)
3. Occultation Experiment—Results of the First Direct Measurements of Mars' Atmosphere and Ionosphere;KLIORE;Science,1965
4. DEVEIKIS, W. D. and SAWYER, J. W., Aerodynamic Characteristics of Tension Shell Shapes at Mach 3.0, NASA TN D-3633 (October 1966)
5. HARRIS, C. D., Transonic Aerodynamic Investigation of Tension Shell and Blunted 100d Conical Shapes for Unmanned Entry Vehicles, NASA TN D-3700 (November 1966)