S. H. Yahaya and  J. M. Ali and  T.A. Abdullah,  Parametric Transition as a Spiral Curve and Its Application in Spur Gear Tooth with FEA.   journal   = {International Journal of Mechanical and Mechatronics Engineering}, [online]. World Academy of Science, Engineering and Technology.
    August 2010, vol. 44(8). 631 - 637
    [viewed 26 April 2024]. Available from: https://publications.waset.org/pdf/2645.