M. AbdAlameer N, Haitham Qasem I, Ali Mohamad H. Oscillation Theorems of Solutions of Third Order Nonlinear Neutral Differential Equations with Periodic Coefficients. Al-Nahrain J. Sci. [Internet]. 2026 Mar. 16 [cited 2026 May 22];29(1):185-9. Available from: https://anjs.edu.iq/index.php/anjs/article/view/2962