Ullah, N., T. Cong, B. Huan, and H. Yucheng. “Influence of Optimal Tooth Modifications on Dynamic Characteristics of a Vehicle Gearbox”. International Journal of Automotive and Mechanical Engineering, vol. 16, no. 1, Mar. 2019, pp. 6319-31, doi:10.15282/ijame.16.1.2019.16.0478.