Wang Y-R, Chang Y-S. Study of Primary and Internal Resonance on 3D Free-Free Double-Section Beam. Adv. technol. innov. [Internet]. 2020 Sep. 1 [cited 2024 Apr. 25];5(4):270-91. Available from: https://ojs.imeti.org/index.php/AITI/article/view/5290