Well-posedness of Dirichlet and Poincare problems in a cylindrical domain for degenerate many dimensional hyperbolic equations with Gellerstedt operator. Neliniini Kolyvannya, [S. l.], v. 18, n. 1, p. 10–19, 2015. Disponível em: https://twinhead.imath.kiev.ua/index.php/nosc/article/view/765. Acesso em: 8 dec. 2025.