Preconditioned Conjugate Gradient Methods for Integral Equations of the Second Kind Defined on the Half-Line. Journal of Computational Mathematics, [S. l.], v. 14, n. 3, p. 223–236, 1996. Disponível em: https://www.global-sci.com/index.php/JCM/article/view/11212. Acesso em: 6 dec. 2025.