COLONIUS, F.; FABBRI, R.; JOHNSON, R.; SPADINI, M. Bifurcation phenomena in control flows. Topological Methods in Nonlinear Analysis, [S. l.], v. 30, n. 1, p. 87–111, 2007. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.2007.020. Acesso em: 22 jul. 2024.