Koshanov B, Koshanova G, Azimkhan G, Segizbayeva R. SOLVABILITY OF BOUNDARY VALUE PROBLEMS WITH NON-LOCAL CONDITIONS FOR MULTIDIMENSIONAL HYPERBOLIC EQUATIONS. СФМН [Интернет]. 7 апрель 2020 г. [цитируется по 4 май 2024 г.];(2):103-11. доступно на: https://journals.nauka-nanrk.kz/physics-mathematics/article/view/412