I. K. Hanan, “The Homotopy Analysis Method for Solving Multi- Fractional Order Integro-Differential Equations”, Al-Nahrain J. Sci., vol. 14, no. 3, pp. 139–143, Sep. 2011, Accessed: May 22, 2026. [Online]. Available: https://anjs.edu.iq/index.php/anjs/article/view/849