1. ANSI/AGMA ISO 1328-1:1995, Cylindrical Gears. ISO System of Accuracy. Part 1: Definitions and Allowable Values of Deviations Relevant to Corresponding Flanks of Gear Teeth,1995
2. ANSI/AGMA ISO 1122-1:1998/Cor 1:1999, Vocabulary of Gear Terms. Part 1: Definitions Related to Geometry,1998
3. ANSI/AGMA ISO 21771:2007, Cylindrical Involute Gears and Gear Pair. Concepts and Geometry,2007
4. Gear Geometry and Applied Theory;Litvin,2004
5. Topology of modified surfaces of involute helical gears with line contact developed for improvement of bearing contact;Litvin,2005