Jing Li and  Guang Zhou,  Some New Inequalities for Eigenvalues of the Hadamard Product and the Fan Product of Matrices.   journal   = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology.
    September 2013, vol. 75(3). 409 - 413
    [viewed 19 April 2024]. Available from: https://publications.waset.org/pdf/16985.