ORPEL, Aleksandra. Sufficient and necessary conditions for the existence of positive solutions with finite energy for elliptic systems in exterior domains. Topological Methods in Nonlinear Analysis, [S. l.], v. 67, n. 1, p. 53–68, 2026. DOI: 10.12775/TMNA.2025.035. Disponível em: https://apcz.umk.pl/TMNA/article/view/70080. Acesso em: 25 jul. 2026.