P.  Ramesh, V.  Manikandan, 
    Stability Analysis of Two-Dimensional Linear Time Invariant Discrete Systems,
    Research Journal of Applied Sciences,
    Volume 9,Issue 12,
    2014,
    Pages 924-930,
    ISSN 1815-932x,
    rjasci.2014.924.930,
    (https://makhillpublications.co/view-article.php?doi=rjasci.2014.924.930)
    Abstract: In this study, an algebraic test is presented to test the stability two-dimensional linear time invariant discrete system represented in the form of its characteristics equation. This characteristics equation is converted into an equivalent one-dimensional equation and the test is applied. Illustrative examples are presented to show the simplicity and application.
    Keywords: Stability;two-dimensional systems;necessary condition;sufficient condition;linear time invariant systems;discrete systems