1. BS 6168, Specification for non-metallic spur gears, British Standards Institution, London, 1987.
2. Polypenco, Polypenco gears design, Polypenco Corporation, USA, 1985.
3. ESDU, Design of parallel axis straight spur and helical non-metallic gears-choice of material and load capacity, Item 68001, September 1977.
4. A new approach for polymer composite gear design;Mao;Wear,2007
5. A comparison of ratings for plastic gears;Walton,1989