S. YOUNIS, A.; عزام. Existence and uniqueness of the solution of an integro-differential equation of the second order with boundary conditions. Journal of Education and Science (JES), [S. l.], v. 23, n. 4, p. 100–110, 2010. DOI: 10.33899/edusj.2010.59244. Disponível em: https://rjps.uomosul.edu.iq/index.php/edusj/article/view/18364. Acesso em: 4 aug. 2025.