DODDS, N.; RYNNE, B. P. Spectral properties and nodal solutions for second-order, $m$-point, $p$-Laplacian boundary value problems. Topological Methods in Nonlinear Analysis, [S. l.], v. 32, n. 1, p. 21–40, 2008. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.2008.033. Acesso em: 19 apr. 2024.