KONDO, A. Three alternative proofs of the Banach contraction principle. Annales Universitatis Paedagogicae Cracoviensis | Studia ad Didacticam Mathematicae Pertinentia, [S. l.], v. 16, p. 35–41, 2024. DOI: 10.24917/20809751.16.7. Disponível em: https://didacticammath.uken.krakow.pl/article/view/11058. Acesso em: 4 jun. 2025.