PHAM, Van Viet; VU, Tuan. On the Asymptotic Behavior of Solutions of Differential Systems. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 57, n. 1, p. 137–142, 2005. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/3581. Acesso em: 6 dec. 2025.