1. IS0 10825-1995: International Standard. Gears. Wear and Damage to Gear Teeth. Terminology.
2. ANSI/AGMA 1010-E95: American National Standard. Appearance of Gear Teeth. Terminology of Wear and Failure.
3. DIN 3979:1979: Zahnschäden an Zahnradgetriebe Bezeichnung, Merkmale, Ursachen.
4. GOST (State Standard) 27674-88: Friction, Wear, and Lubrication. Terms and Definitions.
5. GOST (State Standard) 30638-99: Tribofatigue. Terms and Definitions.