Danh, Bui Thanh, and Le Hong Ky. “Optimization of Technological Parameters When Plasma Nitriding the Gear Working Surface”. Engineering, Technology & Applied Science Research 13, no. 3 (June 2, 2023): 11006–11010. Accessed April 7, 2025. https://mail.etasr.com/index.php/ETASR/article/view/5946.