Menh, Nguyen Cao, and Tran Duong Tri. “The Balancing of Rotating Machinery As Non-Linear System Passing across a Resonant Region”. Vietnam Journal of Mechanics 25, no. 4 (December 31, 2003): 225–242. Accessed May 4, 2024. https://vjs.ac.vn/index.php/vjmech/article/view/6594.