Discrete Approximations for Singularly Perturbed Boundary Value Problems with Parabolic Layers, I. Journal of Computational Mathematics, [S. l.], v. 14, n. 1, p. 71–97, 1996. Disponível em: https://www.global-sci.com/index.php/JCM/article/view/11200. Acesso em: 5 dec. 2025.