IMPROVING PRECONDITIONED GAUSS-SEIDEL ITERATIVE METHOD FOR L-MATRICES. FUDMA JOURNAL OF SCIENCES, [S. l.], v. 4, n. 1, p. 453–459, 2020. Disponível em: https://fjs.fudutsinma.edu.ng/index.php/fjs/article/view/67. Acesso em: 11 sep. 2025.