MUHAMBETOVA, B.Zh.; SARTABANOV, Zh.A.; KULZHUMIEVA, A.A. Multiperiodic solutions of systems of equations with one quasi-linear differential operator in partial derivatives of the first order. Bulletin of the Karaganda University. Mathematics Series, [S. l.], v. 78, n. 2, p. 112–117, 2015. Disponível em: http://mts.buketov.edu.kz/index.php/mathematics-vestnik/article/view/31. Acesso em: 7 sep. 2025.