Ali Mohamad H, Falih Jaddoa A. Property of oscillation of first order impulsive neutral differential equations with positive and negative coefficients. J. Al-Qadisiyah Comp. Sci. Math. [Internet]. 2019 Jan. 24 [cited 2024 Sep. 21];11(1):Math Page 45 - 51. Available from: https://jqcsm.qu.edu.iq/index.php/journalcm/article/view/457