Mahdi Nouri,  Bisymmetric, Persymmetric Matrices and Its Applications in Eigen-decomposition of Adjacency and Laplacian Matrices.   journal   = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology.
    July 2012, vol. 67(7). 766 - 769
    [viewed 23 April 2024]. Available from: https://publications.waset.org/pdf/5515.