TEDEEV, A. F. Initial-boundary-value problems for quasilinear degenerate hyperbolic equations with damping. Neumann problem. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 58, n. 2, p. 272–282, 2006. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/3451. Acesso em: 7 apr. 2025.