Sylvester A. Aye and  Philippus S. Heyns,  Effect of Speed and Torque on Statistical Parameters in Tapered Bearing Fault Detection.   journal   = {International Journal of Aerospace and Mechanical Engineering}, [online]. World Academy of Science, Engineering and Technology.
    June 2011, vol. 54(6). 1122 - 1124
    [viewed 20 April 2021]. Available from: https://publications.waset.org/pdf/869.