F. S. Fadhel and S. F. Noaman, “The Generalized Backstepping Control Method for Stabilizing and Solving Systems of Multiple Delay Differential Equations”, Al-Nahrain J. Sci., no. 1, pp. 150–156, Oct. 2018, Accessed: May 22, 2026. [Online]. Available: https://mail.anjs.edu.iq/index.php/anjs/article/view/2027