JOHANSSON, B. Problembaserad matematikundervisning och demokrati. NOMAD Nordic Studies in Mathematics Education, [S. l.], v. 2, n. 2, p. 4–5, 1994. DOI: 10.7146/nomad.v2i2.146032. Disponível em: https://tidsskrift.dk/NOMAD/article/view/146032. Acesso em: 9 jan. 2025.