Shuimiao Wan and  Chao Yuan and  Baoguang Tian,  Two New Relative Efficiencies of Linear Weighted Regression.   journal   = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology.
    June 2015, vol. 102(6). 316 - 319
    [viewed 27 April 2024]. Available from: https://publications.waset.org/pdf/10001598.