1. Dudley's Gear Handbook;Townsend,2011
2. Gear Materials, Properties, and Manufacture;Davis,2005
3. Gear metrology;Goch;Ann. CIRP,2003
4. Deutsche Normen (DIN) Standard 3962, Tolerances for cylindrical gear teeth, © Beuth Veriag GmbH Berlin, Germany.
5. Advanced Machining Processes of Metallic Materials;Grzesik,2008