ALDIBEKOV, T. M.; ALDAZHAROVA, M. M. Stability of differential systems on the first approach. Journal of Mathematics, Mechanics and Computer Science, [S. l.], v. 72, n. 1, p. 3–6, 2012. Disponível em: https://bm.kaznu.kz/index.php/kaznu/article/view/121. Acesso em: 22 dec. 2024.