Ahmet Y. Arabul and  Ibrahim Senol and  Fatma Keskin Arabul and  Mustafa G. Aydeniz and  Yasemin Oner and  Gokhan Kalkan,  An Investigation on Hot-Spot Temperature Calculation Methods of Power Transformers.   journal   = {International Journal of Energy and Power Engineering}, [online]. World Academy of Science, Engineering and Technology.
    January 2015, vol. 104(8). 1036 - 1040
    [viewed 21 September 2020]. Available from: https://publications.waset.org/pdf/10003802.