1. 1) Theodorsen, T.: General Theory of Aerodynamic Instability and the Mechanism of Flutter, NACA Report, 496, 1935, pp. 2–21.
2. 4) Bisplinghoff, R. L., Ashley, H. and Halfman, R. L.: Aeroelasticity, Addison-Wesley Publishing Co. Inc., Massachusetts, 1957, pp. 251–287.
3. Extended Theodorsen Function for an Airfoil with a Wake.