1. M. Kolivand, Development of Tooth Contact and Mechanical Efficiency Models for Face-milled and Face-hobbed Hypoid and Spiral Bevel Gears. Columbus, OH, USA: Ohio State University, 2009.
2. T. H. Le, V. B. Pham, and T. D. Hoang, "Surface Finish Comparison of Dry and Coolant Fluid High-Speed Milling of JIS SDK61 Mould Steel," Engineering, Technology & Applied Science Research, vol. 12, no. 1, pp. 8023–8028, Feb. 2022.
3. D. Pye, Practical Nitriding and Ferritic Nitrocarburizing. ASM International, 2003.
4. ISO/TR 22849:2011(en), Design recommendations for bevel gears. ISO, 2011.
5. D. Y. Chung, H. J. Kim, and H. N. Kim, "A Study on the Erosion Characteristics of the Micropulsed Plasma Nitrided Barrel of a Rifle," in 19th International Symposium of Ballistics, Interlaken, Switzerland, May 2001.