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Fatma N. A. Mohamed, Mohamed H. Amsaad. Analytical Results on existence and stability for coupled systems of three 1st order nonlinear differential equations with nonlocal conditions using Banach contraction mapping approach . AJAPAS [Internet]. 2026 Mar. 14 [cited 2026 Mar. 19];5(1):417-29. Available from: https://aaasjournals.com/index.php/ajapas/article/view/1900