M. Khalil, Muayyad, and مؤید. 2025. “A Study on the Conditions of Oscillation of Solutions of Second Order Impulsive Delay Differential Equations”. AL-Rafidain Journal of Computer Sciences and Mathematics 9 (1):129-37. https://rjps.uomosul.edu.iq/index.php/csmj/article/view/19692.