CAPIETTO, A.; MAWHIN, J.; ZANOLIN, F. On the existence of two solutions with a prescribed number of zeros for a superlinear two-point boundary value problem. Topological Methods in Nonlinear Analysis, [S. l.], v. 6, n. 1, p. 175–188, 1995. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.1995.039. Acesso em: 23 feb. 2024.