Ibrahim, Salisu, and Abdulnasir Isah. “Solving System of Fractional Order Differential Equations Using Legendre Operational Matrix of Derivatives”. EURASIAN JOURNAL OF SCIENCE AND ENGINEERING 7, no. 1 (June 29, 2021): 25–37. Accessed April 19, 2026. https://eajse.tiu.edu.iq/index.php/eajse/article/view/181.