Jwamer K, Ahmed S, Abdullah D. Approximate Solution of Volterra Integro-Fractional Differential Equations Using Quadratic Spline Function. M [Internet]. 2021 Mar. 30 [cited 2025 Jul. 10];101(1):50-64. Available from: http://mts.buketov.edu.kz/index.php/mathematics-vestnik/article/view/421