HANNULA, Markku S.; PEHKONEN, Erkki; MAIJALA, Hanna; SORO, Riitta. Levels of students’ understanding on infinity. Teaching Mathematics and Computer Science, [S. l.], v. 4, n. 2, p. 317–337, 2006. DOI: 10.5485/TMCS.2006.0129. Disponível em: https://ojs.lib.unideb.hu/tmcs/article/view/14775. Acesso em: 27 sep. 2024.