JANCZEWSKA, J. An approximative scheme of finding almost homoclinic solutions for a class of Newtonian systems. Topological Methods in Nonlinear Analysis, [S. l.], v. 33, n. 1, p. 169–177, 2009. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.2009.012. Acesso em: 22 jul. 2024.