Shuimiao Wan and  Chao Yuan and  Baoguang Tian,  An Estimation of Variance Components in Linear Mixed Model.   journal   = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology.
    November 2015, vol. 108(12). 752 - 755
    [viewed 25 April 2024]. Available from: https://publications.waset.org/pdf/10003235.