WISTEDT, Inger. Elevers svårigheter att formulera matematiska problem. NOMAD Nordic Studies in Mathematics Education, [S. l.], v. 1, n. 1, p. 40–54, 1993. DOI: 10.7146/nomad.v1i1.144988. Disponível em: https://tidsskrift.dk/NOMAD/article/view/144988. Acesso em: 6 dec. 2025.