Kalmenov T, Shaldanbayev A, Akylbayev M, Urmatova A. ON COMPLETENESS OF ROOT VECTORS OF THE CAUCHY PROBLEM OF THE FIRST ORDER EQUATION WITH DEVIATING ARGUMENT. PMS [Интернет]. 7 апрель 2020 г. [цитируется по 1 декабрь 2024 г.];(2):50-7. доступно на: http://189185.vm7pq.group/physics-mathematics/article/view/400