SULEIMENOV, Zh.. On the existence of a conditionally periodic solution of one quasilinear differential system in the critical case. Journal of Mathematics, Mechanics and Computer Science, [S.l.], v. 100, n. 4, p. 8-17, jan. 2019. ISSN 1563-0277. Available at: <http://bm.kaznu.kz/index.php/kaznu/article/view/553>. Date accessed: 19 feb. 2019.