1. Seiff, Sandahl, Chapman, Perkins, Gowen, "Aerodynamic Characteristics of Bodies at Supersonic Speeds - A collection of three papers", NACA RM A51J25, November 1951.
2. Perkins, Jorgensen, "Investigation of the Drag of Various Axially Symmetric Nose Shapes of Fineness Ratio 3 for Mach numbers from 1.24 to 3.67", NACA RM A52H28, January1951.
3. Eggers, Resnikoff, Dennis, "Bodies of Revolution having Minimum Drag at High Supersonic Airspeeds", NACA Report 1306, 1957.