KLEBANOV, B. S. On the attraction and stability of sets with respect to solutions of ordinary differential equations. Topological Methods in Nonlinear Analysis, [S. l.], v. 10, n. 1, p. 107–121, 1997. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.1997.024. Acesso em: 22 jul. 2024.