“The Analytic Solutions of Nonlinear Generalized Pantograph Differential Equations of Higher Order Via Coupled Adomian-Homotopy Technique”. Iraqi Journal of Science 63, no. 11 (November 30, 2022): 4911–4917. Accessed February 22, 2025. https://ijs.uobaghdad.edu.iq/index.php/eijs/article/view/5524.