HASSO, M.; MUSTAFA, K. Solutions of a number of integral single-core Volterra equations. Journal of Education and Science, [S. l.], v. 18, n. 4, p. 113–123, 2006. DOI: 10.33899/edusj.2006.76529. Disponível em: https://edusj.uomosul.edu.iq/index.php/edusj/article/view/42139. Acesso em: 10 sep. 2025.