BLOMHØJ, M.; VALERO, P. Vanskeligheder i/med matematiklæring – behov for øget forskning. NOMAD Nordic Studies in Mathematics Education, [S. l.], v. 11, n. 4, p. 1–6, 2006. DOI: 10.7146/nomad.v11i4.147994. Disponível em: https://tidsskrift.dk/NOMAD/article/view/147994. Acesso em: 9 jan. 2025.