HIRANO, N. Existence of entire solutions for semilinear elliptic problems on ${\mathbb R}^{N}$. Topological Methods in Nonlinear Analysis, [S. l.], v. 13, n. 1, p. 1–15, 1999. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.1999.001. Acesso em: 22 jul. 2024.