1. AGMA Standard 2001-D04, Fundamental Rating Factors and Calculation Methods for Involute Spur and Helical Gear Teeth, American Gear Manufacturers Association, Alexandria, VA, 2004.
2. AGMA Information Sheet 908-B89, Geometry Factors for Determining the Pitting Resistance and Bending Strength of Spur, Helical and Herringbone Gear Teeth, American Gear Manufacturers Association, Alexandria, VA, 1989.
3. ISO Standard 6336-2:1996, Calculation of Load Capacity of Spur and Helical Gears – Part 2: Calculation of Surface Durability (Pitting), International Organization for Standardization, Geneva, Switzerland, 1996.
4. ISO Standard 6336-3:1996, Calculation of Load Capacity of Spur and Helical Gears – Part 3: Calculation of Tooth Bending Strength, International Organization for Standardization, Geneva, Switzerland, 1996.
5. ISO Standard 6336-1:1996, Calculation of Load Capacity of Spur and Helical Gears – Part 1: Basic Principles, Introduction and General Influence Factors, International Organization for Standardization, Geneva, Switzerland, 1996.