“Exact and Approximate Solution of Multi-Higher Order Fractional Differential Equations Via Sawi Transform and Sequential Approximation Method”. JOURNAL OF UNIVERSITY OF BABYLON for Pure and Applied Sciences 32, no. 1 (March 31, 2024): 311–334. Accessed January 19, 2026. https://mail.journalofbabylon.com/index.php/JUBPAS/article/view/5139.