BERGSTEN, Christer. News from Nordic mathematics education. NOMAD Nordic Studies in Mathematics Education, [S. l.], v. 18, n. 2, p. 93–102, 2013. DOI: 10.7146/nomad.v18i2.148509. Disponível em: https://tidsskrift.dk/NOMAD/article/view/148509. Acesso em: 6 dec. 2025.