1. By United States;Analysis of Mechanical Defect Accidents of Motor Carriers,1944
2. Robins, Robert R., “Tooth Engagement Evaluation of Involute Spline Couplings” (2008). Theses and Dissertations. 1834.
3. Hayashi and T. Hayashi, “Miniaturization of Involute Spline Couplings- Discussion from Torsional Stiffness and Yield Torque,” Bulletin of JSME, vol. 28, no. 236, pp. 259-266, 1985.
4. Foundation of the mechanical design,1979
5. Fellows Corporation, “Back to Basics,” Gear Technology, pp. 37-48, October 1984.