JASIM MOHAMMED, A.; امل. Solution of Higher Order Linear Freadholm Integro-differential Equation by Elementary Approximation. Journal of Education and Science (JES), [S. l.], v. 22, n. 2, p. 147–154, 2009. DOI: 10.33899/edusj.2009.57703. Disponível em: https://rjps.uomosul.edu.iq/edusj/article/view/17485. Acesso em: 4 aug. 2025.