Ibrar Ul Haq, and Zakir Ullah. “Natural Decomposition Method and Coupled Systems of Nonlinear Fractional Order Partial Differential Equations”. Results in Nonlinear Analysis 3, no. 1 (November 7, 2022): 35–44. Accessed April 2, 2025. https://nonlinear-analysis.com/index.php/pub/article/view/43.