GREVHOLM, Barbro. The Nordic Graduate School into its fourth year of activities. NOMAD Nordic Studies in Mathematics Education, [S. l.], v. 11, n. 4, p. 137–141, 2006. DOI: 10.7146/nomad.v11i4.148000. Disponível em: https://tidsskrift.dk/NOMAD/article/view/148000. Acesso em: 6 dec. 2025.