1.
Sartabanov Z, Omarova B. On multi-periodic solutions of quasilinear autonomous systems with an operator of differentiation on the Lyapunov’s vector field. M [Internet]. 2019 Jun. 28 [cited 2025 Dec. 8];2(94):70-83. Available from: https://mts.buketov.edu.kz/mathematics-vestnik/article/view/295