Koshanov B, Koshanova G, Azimkhan G, Segizbayeva R. SOLVABILITY OF BOUNDARY VALUE PROBLEMS WITH NON-LOCAL CONDITIONS FOR MULTIDIMENSIONAL HYPERBOLIC EQUATIONS. PMS [Интернет]. 7 апрель 2020 г. [цитируется по 1 декабрь 2024 г.];(2):103-11. доступно на: http://189185.vm7pq.group/physics-mathematics/article/view/412