HILBERT, D. O pojęciu liczby. Annales Universitatis Paedagogicae Cracoviensis | Studia ad Didacticam Mathematicae Pertinentia, [S. l.], v. 4, p. 199–202, 2017. Disponível em: https://didacticammath.uken.krakow.pl/article/view/3672. Acesso em: 8 may. 2024.