SARTABANOV, Zh.A.; OMAROVA, B.Zh. On multi-periodic solutions of quasilinear autonomous systems with an operator of differentiation on the Lyapunov’s vector field. Bulletin of the Karaganda University. Mathematics Series, [S. l.], v. 94, n. 2, p. 70–83, 2019. DOI: 10.31489/2019m2/70-83. Disponível em: http://mts.buketov.edu.kz/index.php/mathematics-vestnik/article/view/295. Acesso em: 18 aug. 2025.