WASET
    Fred Lacy,  Understanding the Behavior of Superconductors by Analyzing Permittivity.   journal   = {International Journal of Electrical and Computer Engineering}, [online]. World Academy of Science, Engineering and Technology.
    January 2021, vol. 170(2). 60 - 67
    [viewed 25 April 2024]. Available from: https://publications.waset.org/pdf/10011843.