Torabi, K, H Afshari, M Sadeghi, and H Toghian. “Exact Closed-Form Solution for Vibration Analysis of Truncated Conical and Tapered Beams Carrying Multiple Concentrated Masses”. Journal of Solid Mechanics 9, no. 5 (December 30, 2017): 760–782. Accessed July 28, 2026. https://oiccpress.com/jsm/article/view/12629.