1. Development of Gear Technology and Theory of Gearing;Litvin,1997
2. The Theory and Practice of Worm Gear Drives;Dudas,2000
3. Design and Application of the Worm Gear;Crosher,2002
4. Dudley's Handbook of Practical Gear Design and Manufacture;Radzevich,2012
5. Foundation of Meshing Theory For Gear Drives;Dong,1989