Sun, Jie, Peng Xu, MingLi Chen, and Jianghong Xue. “Forced Vibration of Time-Varying Elevator Traction System”. Strojniški vestnik - Journal of Mechanical Engineering 70, no. 3-4 (March 28, 2024): 170–180. Accessed June 15, 2024. https://ojs30.sv-jme.eu/index.php/sv-jme/article/view/852.