WASET
    Masato Sasaki and  Masayoshi Yamamoto,  Exciting Voltage Control for Efficiency Maximization for 2-D Omni-Directional Wireless Power Transfer Systems.   journal   = {International Journal of Electrical and Computer Engineering}, [online]. World Academy of Science, Engineering and Technology.
    April 2017, vol. 125(5). 606 - 610
    [viewed 23 April 2024]. Available from: https://publications.waset.org/pdf/10007198.