Roman Kalvin and  Anam Nadeem and  Shahab Khushnood,  Stress Analysis of Spider Gear Using Structural Steel on ANSYS.   journal   = {International Journal of Aerospace and Mechanical Engineering}, [online]. World Academy of Science, Engineering and Technology.
    August 2018, vol. 141(9). 920 - 923
    [viewed 15 July 2020]. Available from: https://publications.waset.org/pdf/10009545.