ZH.A. SARTABANOV; B.ZH. OMAROVA; A.KERIMBEKOV. RESEARCH OF MULTIPERIODIC SOLUTIONS OF PERTURBED LINEAR AUTONOMOUS SYSTEMS WITH DIFFERENTIATION OPERATOR ON THE VECTOR FIELD. Physico-mathematical series, [S. l.], n. 6, p. 63–79, 2019. Disponível em: https://journals.nauka-nanrk.kz/physics-mathematics/article/view/1694. Acesso em: 4 дек. 2024.