K. N. Dinesh Babu and P. K. Gargava, Transformer Life Enhancement Using Dynamic Switching of Second Harmonic Feature in IEDs. journal = {International Journal of Energy and Power Engineering}, [online]. World Academy of Science, Engineering and Technology. March 2017, vol. 124(4). 406 - 411 [viewed 21 September 2024]. Available from: https://publications.waset.org/pdf/10006945.