MALLICK, M.; VERMA, R. B. A three solutions theorem for Pucci’s extremal operator and its application. Topological Methods in Nonlinear Analysis, [S. l.], v. 58, n. 1, p. 161–179, 2021. DOI: 10.12775/TMNA.2020.066. Disponível em: https://apcz.umk.pl/TMNA/article/view/35210. Acesso em: 23 apr. 2024.