Jassim, Hassan Kamil, and Hussein Khashan Kadhim. “The Approximate Solutions for Volterra Integro-Differential Equations Within Local Fractional Integral Operators ”. University of Thi-Qar Journal, vol. 12, no. 3, Apr. 2019, p. 127_133, https://www.jutq.utq.edu.iq/index.php/main/article/view/107.