1. Derek Smith, J. Gear Noise and Vibration. 2nd Edition. April 8, 2003. CRC Press. ISBN 9780824741297.
2. Patel J, Sahu G, Sen PK. A Study on Common Failure of Gears. IJIRT. Volume 2, issue 6. November 2015.
3. Niemann G, Winter H. Getriebeschaeden and Abhife, Entwicklugstendenzen, Maschinenelemente, Vol 2, 2nd ed. S.i. Springer-Verlag (Berlin), 1983.
4. Failure modes in gears;Shipley,1973
5. American National Standard: Appearance of Gear Teeth – Terminology of Wear and Failure ANSI/AGMA. American National Standards Institute/American Gear Manufacturers Association. 1010-E95 ISBN: 1-55589-665-0.