JOHANSSON, Bengt; KILPATRICK, Jeremy. Standardized mathematics testing in Sweden: the legacy of Frits Wigforss. NOMAD Nordic Studies in Mathematics Education, [S. l.], v. 2, n. 1, p. 6–30, 1994. DOI: 10.7146/nomad.v2i1.145003. Disponível em: https://tidsskrift.dk/NOMAD/article/view/145003. Acesso em: 8 dec. 2025.