Khiem, Nguyen Tien, and Duong The Hung. “A Closed-Form Solution for Free Vibration of Multiple Cracked Timoshenko Beam and Application”. Vietnam Journal of Mechanics 39, no. 4 (December 27, 2017): 315–328. Accessed March 28, 2024. https://vjs.ac.vn/index.php/vjmech/article/view/9641.