1. Sloane, A., in Engineering Kinematics. The Macmillan Company, New York, 1959
2. Surface Geometry of Straight and Spiral Bevel Gears
3. The Modeling of Bevel Gears Using the Exact Spherical Involute
4. AGMA Standard System for Spiral Bevel Gears, AGMA Publication No. 209.03, 1964
5. DIN 3971, Gear tooth systems, specification factors and errors relating to Bevel gears, basic terms and definitions, 1956