Well-posedness of Dirichlet and Poincare problems in a cylindrical domain for degenerate many dimensional hyperbolic equations with Gellerstedt operator. НК [Internet]. 2015 Mar. 29 [cited 2025 Dec. 8];18(1):10-9. Available from: https://twinhead.imath.kiev.ua/index.php/nosc/article/view/765