KUDRYK, T. Introduction to E. Nelson’s internal set theory. Annales Universitatis Paedagogicae Cracoviensis | Studia ad Didacticam Mathematicae Pertinentia, [S. l.], v. 7, p. 59–78, 2017. Disponível em: https://didacticammath.uken.krakow.pl/article/view/3631. Acesso em: 21 nov. 2024.