MUSILEK, M. Natürlich Mathematik. R&E-SOURCE, [S. l.], v. 10, n. 2, p. 31–40, 2023. DOI: 10.53349/resource.2023.i2.a1167. Disponível em: https://journal.ph-noe.ac.at/index.php/resource/article/view/1167. Acesso em: 19 apr. 2024.