BATTELLI, F.; FEČKAN, M. Chaos arising near a topologically transversal homoclinic set. Topological Methods in Nonlinear Analysis, [S. l.], v. 20, n. 2, p. 195–215, 2002. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.2002.033. Acesso em: 28 apr. 2024.