I.O. Isaac  , Zsolt Lipcsey  , 
    Oscillations in Systems of Neutral Impulsive Differential Equations,
    Journal of Modern Mathematics and Statistics,
    Volume 3,Issue 1,
    2009,
    Pages 17-21,
    ISSN 1994-5388,
    jmmstat.2009.17.21,
    (https://makhillpublications.co/view-article.php?doi=jmmstat.2009.17.21)
    Abstract: In this study, we establish new oscillation criteria for system of neutral impulsive differential equations with constant delays. Expressed as theorems, the criteria give explicit sufficient conditions for the oscillations of every solution of the said system and are readily generalized for non-autonomous cases.
    Keywords: Systems of neutral impulsive differential equations;oscillation criteria