1. A General Theory of the Kinematics and Geometry of Gears in Three Dimensions;Dyson,1969
2. Second order surface generation;Baxter;Industrial Mathematics,1974
3. Theory of Gearing, NASA Reference Publication 1212;Litvin,1989
4. Local Synthesis and Tooth Contact Analysis of Face-milled Spiral Bevel Gears, NASA Contractor Report 4342;Litvin,1991
5. Gear Geometry and Applied Theory;Litvin,2004