CHAIRA, K.; CHAIRA, S.; LAZAIZ, S. On Caristi fixed point theorem for set-valued mappings. Topological Methods in Nonlinear Analysis, [S. l.], v. 59, n. 1, p. 153–161, 2022. DOI: 10.12775/TMNA.2021.030. Disponível em: https://apcz.umk.pl/TMNA/article/view/37625. Acesso em: 22 jul. 2024.