MARCELLI, C.; PAPALINI, F. Comparison results and existence of bounded solutions to strongly nonlinear second order differential equations. Topological Methods in Nonlinear Analysis, [S. l.], v. 36, n. 1, p. 91–110, 2009. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.2009.031. Acesso em: 27 apr. 2024.