Asymptotic Criteria of Neutral Differential Equations with Positive and Negative Coefficients and Impulsive Integral Term. Iraqi Journal of Science [Internet]. 2020 Sep. 29 [cited 2024 Nov. 22];61(9):2315-23. Available from: https://ijs.uobaghdad.edu.iq/index.php/eijs/article/view/1732