Ali Raad Hassan,  Transient Stress Analysis on Medium Modules Spur Gear by Using Mode Super Position Technique.   journal   = {International Journal of Mechanical and Mechatronics Engineering}, [online]. World Academy of Science, Engineering and Technology.
    May 2009, vol. 29(5). 463 - 470
    [viewed 10 April 2021]. Available from: https://publications.waset.org/pdf/3971.