1. Newkirk, B. L., “Shaft Whipping,” General Electric Review (1924).
2. Kimball, A.J., “Internal Friction Theory of Shaft Whirling,” General Electric Rep. Vol. 27, p. 266 (1926).
3. Robertson, D., “Hysteretic Influences on the Whirling of Rotors,” Proc. Inst. Mech. Eng., Vol. 131, p. 513 (1935).
4. Kimball, A.L., “Measurement of Internal Friction is a Revolving Deflected Shaft,” General Electric Review, Vol. 28, p. 554 (1925).
5. Kushul, M.Y. “The Self-Induced Oscillations of Rotors,” Consultants Bureau, NY (1964).