Zh.A. Sartabanov, B.Zh. Omarova, A.Kerimbekov. RESEARCH OF MULTIPERIODIC SOLUTIONS OF PERTURBED LINEAR AUTONOMOUS SYSTEMS WITH DIFFERENTIATION OPERATOR ON THE VECTOR FIELD. СФМН [Интернет]. 12 декабрь 2019 г. [цитируется по 18 апрель 2024 г.];(6):63-79. доступно на: https://journals.nauka-nanrk.kz/physics-mathematics/article/view/1694