BARTSCH, T.; WETH, T. A note on additional properties of sign changing solutions to superlinear elliptic equations. Topological Methods in Nonlinear Analysis, [S. l.], v. 22, n. 1, p. 1–14, 2003. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.2003.025. Acesso em: 22 jul. 2024.