JAPÓN, Maria; MALEC, Marek; PIASECKI, Łukasz. Short proofs of Cambern’s 1968 theorem and its generalizations applicable to fixed point theory. Topological Methods in Nonlinear Analysis, [S. l.], v. 67, n. 1, p. 87–102, 2025. DOI: 10.12775/TMNA.2025.038. Disponível em: https://apcz.umk.pl/TMNA/article/view/66882. Acesso em: 18 may. 2026.