BREKKE, G.; GJONE, G. NOMAD over Kjølen. NOMAD Nordic Studies in Mathematics Education, [S. l.], v. 5, n. 1, p. 4–6, 1997. DOI: 10.7146/nomad.v5i1.146481. Disponível em: https://tidsskrift.dk/NOMAD/article/view/146481. Acesso em: 9 jan. 2025.