Some Perturbation Problems on 2x2 Nonlinear Hyperbolic Conservation Laws. Journal of Partial Differential Equations, [S. l.], v. 11, n. 3, p. 245–259, 1998. Disponível em: https://global-sci.com/index.php/jpde/article/view/3888. Acesso em: 5 dec. 2025.