Khang, Nguyen Van, Nguyen Thi Van Huong, Nguyen Van Quyen, and Pham Thanh Chung. “About the Nonlinear Vibration Equation of the Beam”. Vietnam Journal of Mechanics 45, no. 3 (September 30, 2023): 197–215. Accessed May 9, 2024. https://vjs.ac.vn/index.php/vjmech/article/view/18189.