JANCZEWSKA, J. Homoclinic solutions for a class of autonomous second order Hamiltonian systems with a superquadratic potential. Topological Methods in Nonlinear Analysis, [S. l.], v. 36, n. 1, p. 19–26, 2010. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.2010.025. Acesso em: 23 apr. 2024.