GROSSI, Massimo; KESAVAN, S.; PACELLA, Filomena; RAMASWAMY, M. Symmetry of positive solutions of some nonlinear equations. Topological Methods in Nonlinear Analysis, [S. l.], v. 12, n. 1, p. 47–59, 1998. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.1998.027. Acesso em: 8 jul. 2025.