Kiamran Radjabli,  Practical Techniques of Improving State Estimator Solution.   journal   = {International Journal of Energy and Power Engineering}, [online]. World Academy of Science, Engineering and Technology.
    May 2020, vol. 162(6). 181 - 186
    [viewed 12 August 2020]. Available from: https://publications.waset.org/pdf/10011277.