S. D. Nedelcut and  V. Proca and  D. M. Purcaru,  Monitoring of Dielectric Losses and Use of Ferrofluids for Bushing Cooling.   journal   = {International Journal of Electrical and Computer Engineering}, [online]. World Academy of Science, Engineering and Technology.
    April 2008, vol. 16(4). 605 - 610
    [viewed 20 April 2024]. Available from: https://publications.waset.org/pdf/6151.