H. Saadoon, Lamyaa, and لمیاء. “Integral Operators of Mixed Type of Nonlinear Integral Equation”. Journal of Education and Science (JES) 27, no. 4 (December 28, 2018): 117–127. Accessed August 4, 2025. https://rjps.uomosul.edu.iq/index.php/edusj/article/view/17797.