Zh.A. Sartabanov, B.Zh. Omarova, и A.Kerimbekov. «RESEARCH OF MULTIPERIODIC SOLUTIONS OF PERTURBED LINEAR AUTONOMOUS SYSTEMS WITH DIFFERENTIATION OPERATOR ON THE VECTOR FIELD». Academic Scientific Journal of Computer Science, no. 6 (декабрь 12, 2019): 63–79. просмотрено февраль 17, 2026. https://journals.nauka-nanrk.kz/physics-mathematics/article/view/1694.