Rana Abdul Jabbar Khan and  Muhammad Akmal,  Mathematical Modeling of Current Harmonics Caused by Personal Computers.   journal   = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology.
    March 2008, vol. 15(3). 182 - 186
    [viewed 24 April 2024]. Available from: https://publications.waset.org/pdf/1988.