WASET
    S. Yunus and  A. Suratman and  N. Mohamad Nor and  M. Othman,  Effectiveness of Earthing System in Vertical Configurations.   journal   = {International Journal of Electrical and Computer Engineering}, [online]. World Academy of Science, Engineering and Technology.
    January 2021, vol. 169(1). 38 - 41
    [viewed 11 May 2024]. Available from: https://publications.waset.org/pdf/10011760.