BERGSTEN, Christer. News from Nordic mathematics education. NOMAD Nordic Studies in Mathematics Education, [S. l.], v. 16, n. 4, p. 103–117, 2011. DOI: 10.7146/nomad.v16i4.148411. Disponível em: https://tidsskrift.dk/NOMAD/article/view/148411. Acesso em: 7 dec. 2025.