KLEBANOV, B. S. On asymptotically autonomous differential equations in the plane. Topological Methods in Nonlinear Analysis, [S. l.], v. 10, n. 2, p. 327–338, 1997. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.1997.035. Acesso em: 22 lip. 2024.