Formation of Singularities for Quasilinear Hyperbolic Systems with Characteristics with Constant Multiplicity. Journal of Partial Differential Equations, [S. l.], v. 18, n. 4, p. 355–370, 2020. Disponível em: https://gsp.tricubic.dev/jpde/article/view/4059. Acesso em: 15 mar. 2026.