WARD, JR., J. R. Global continuation for bounded solutions of ordinary differential equations. Topological Methods in Nonlinear Analysis, [S. l.], v. 2, n. 1, p. 75–90, 1993. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.1993.031. Acesso em: 29 mar. 2024.