Ling Zhang and  Ting-Zhu Huang,  Sign Pattern Matrices that Admit P0 Matrices.   journal   = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology.
    December 2011, vol. 60(12). 1960 - 1963
    [viewed 19 March 2024]. Available from: https://publications.waset.org/pdf/11775.