Jalal M. Abdallah,  Power Transformers Insulation Material Investigations: Partial Discharge .   journal   = {International Journal of Energy and Power Engineering}, [online]. World Academy of Science, Engineering and Technology.
    March 2015, vol. 107(11). 1352 - 1357
    [viewed 10 May 2024]. Available from: https://publications.waset.org/pdf/10006795.