RABINOWITZ, P. H. Heteroclinics for a Hamiltonian system of double pendulum type. Topological Methods in Nonlinear Analysis, [S. l.], v. 9, n. 1, p. 41–76, 1997. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.1997.004. Acesso em: 22 lip. 2024.