1. F. M. Lewis, “Vibration during acceleration through a critical speed”. Transaction ASME 54, 253–261 (1932).
2. V. A. Mitropolskii, Problems of the Asymptotic Theory of Nonstationary Vibrations, Israel Program for Scientific Translations, Jerusalem (1965).
3. R. M. Evan-Iwanowski, Resonance Oscillations in Mechanical Systems, Elsevier Scientific Publishing Co., New York (1976).
4. I.-M. Shyu, D. Mook and R. H. Plaut, “Whirling of a forced cantilever beam with static deflection-iii: passage through resonance”. Nonlinear Dynamics 4, 461–481 (1993).
5. J. Kevorkian and J. D. Cole, Multiple Scale and Singular Perturbation Methods, Springer-Verlag, New York (1996).