Toshiaki Yanada and  Kazumi Ishikawa,  Analysis and Performance Evaluation of Noise-Reduction Transformer.   journal   = {International Journal of Electrical and Computer Engineering}, [online]. World Academy of Science, Engineering and Technology.
    May 2012, vol. 65(5). 520 - 524
    [viewed 21 October 2019]. Available from: https://publications.waset.org/pdf/9412.