Nguyen Hoang Viet, Nguyen Thuy Duong, Nguyen Thanh Trung, and Nguyen Hong Thai. “Design of Internal Non-Circular Gear- Train With Improved Cycloid Profile”. Journal of Technical Education Science 15, no. 6 (December 31, 2020): 85–93. Accessed April 7, 2026. https://www.jte.edu.vn/index.php/jte/article/view/31.