Hasso, Mohammad, and Amal Jasim Mohammed. “On Investigation of the Convergence by Least Square Method for Solving Fredholm Integral”. Journal of Education and Science 21, no. 2 (June 1, 2008): 143–149. Accessed September 10, 2025. https://edusj.uomosul.edu.iq/index.php/edusj/article/view/42547.