1. Coe, Charles F., “Steady and Fluctuating Pressure at Transonic Speeds on Two Space Vehicle Payload Shapes”, NASA TM X503, March 1961.
2. Ericsson, L-E., “Relation Between Static and Dynamic Characteristics for a Slowly Oscillating Blunt Re-entry Body with Non-Linear Amplitude Effects, Part I, Pitch Oscillation Around a Fixed Axis”, LMSD TM 53–14-100, April 1961, Confidential.
3. Ericsson, L-E., “Relation Between Static and Dynamic Characteristics for a Slowly Oscillating Blunt Re-entry Body with Non-Linear Amplitude Effects, Part II, Planar Motion-Pitch Oscillation and Translation”, LMSD/DP/M-TM-24, April 1961.