1. Theodorsen, Theodore, "Theory of Wing Sections of Arbitrary Shape", NACA TR 411, 1931.
2. Whitcomb, R. T., "A Study of the Zero Lift Drag-Rise Characteristics of Wing-Body Combinations Near the Speed of the Sound", NACA TR 1273, 1956.
3. Whitcomb, R. T., "Review of NASA Supercritical Airfoils", 9th ICAS Congress, Haifa, Paper 74-10, 1974.
4. Whitcomb, R. T., "A Design Approach and Selected Wind Tunnel Results at High Subsonic Speeds for Wing-Tip Mounted Winglets", NASA TN D8260, 1976.
5. Morawetz, C. S., "On the Non-Existence of Continuous Transonic Flows Past Profiles", Comm. Pure. Appl. Math., 9, 1956, pp. 45–48.