CHANG, K. C.; LI, S.; LIU, J. Remarks on multiple solutions for asymptotically linear elliptic boundary value problems. Topological Methods in Nonlinear Analysis, [S. l.], v. 3, n. 1, p. 179–187, 1994. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.1994.008. Acesso em: 3 lip. 2024.