Nguyen, Hong Thai, Thanh Trung Nguyen, Thuy Duong Nguyen, and Hoang Viet Nguyen. “Shaping Tooth Profile of Common Non-Circular Gears Using Rack and Novikov Tooth Profile”. Old Journal, no. 140 (January 15, 2020): 11–17. Accessed August 2, 2025. https://jst.vn/index.php/old/article/view/559.