BERGSTEN, Christer. News from Nordic mathematics education. NOMAD Nordic Studies in Mathematics Education, [S. l.], v. 19, n. 1, p. 75–84, 2014. DOI: 10.7146/nomad.v19i1.148628. Disponível em: https://tidsskrift.dk/NOMAD/article/view/148628. Acesso em: 6 dec. 2025.