WASET
    Berlin Yu,  A Preliminary Study on the Eventual Positivity of Irreducible Tridiagonal Sign Patterns.   journal   = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology.
    December 2011, vol. 60(12). 2007 - 2010
    [viewed 08 May 2024]. Available from: https://publications.waset.org/pdf/400.