1. Von Karman, Theodore, “The Engineer Grapples with Nonlinear Problems,” Bulletin of the American Mathematical Society, Vol. 46, 1940.
2. Dowell, E. H. and Ilgamov, M., “Studies in Nonlinear Aeroelasticity,” Springer-Verlag, 1988.
3. Dowell, E. H., “Aeroelasticity of Plates and Shells,” Noordhoff International Publishing, Leyden, 1975.
4. Bolotin, V. V., “Nonconservative Problems of the Elastic Theory of Stability,” Pergamon Press, 1963.
5. Scanlan, R. H. and Rosenbaum, R., “Introduction to the Study of Aircraft Vibration and Flutter,” The Macmillan Company, New York, N.Y., 1951. Also available in Dover Edition.