Cauchy Problem for a Class of Totally Characteristic Hyperbolic Operators with Characteristics of Variable Multiplicity in Gevrey Classes. Journal of Partial Differential Equations, [S. l.], v. 1, n. 1, p. 31–41, 2018. Disponível em: https://global-sci.com/index.php/jpde/article/view/3590. Acesso em: 6 dec. 2025.