BREKKE, G. Bokomtaler. NOMAD Nordic Studies in Mathematics Education, [S. l.], v. 5, n. 2, p. 56, 1997. DOI: 10.7146/nomad.v5i2.146495. Disponível em: https://tidsskrift.dk/NOMAD/article/view/146495. Acesso em: 9 jan. 2025.