Mohammed, Gh. J., and F.S. Fadhel. “Extend Differential Transform Methods for Solving Differential Equations With Multiple Delay”. Ibn AL-Haitham Journal For Pure and Applied Sciences 24, no. 3 (May 17, 2017). Accessed March 14, 2025. https://jih.uobaghdad.edu.iq/index.php/j/article/view/805.