Zuan-De Wang and  Hou-biao Li and  Zhong-xi Gao,  The Convergence Results between Backward USSOR and Jacobi Iterative Matrices.   journal   = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology.
    August 2013, vol. 77(5). 868 - 871
    [viewed 29 November 2021]. Available from: https://publications.waset.org/pdf/16754.