Solution of a System of Linear Voltera- Integro Differential Equations by Weighted Residual Methods. Al-Nahrain Journal of Science, [S. l.], v. 9, n. 2, p. 123–131, 2006. Disponível em: https://anjs.edu.iq/index.php/anjs/article/view/1676.. Acesso em: 10 may. 2024.