JOHANSSON, B. En flygande start!. NOMAD Nordic Studies in Mathematics Education, [S. l.], v. 1, n. 2, p. 4–5, 1993. DOI: 10.7146/nomad.v1i2.144993. Disponível em: https://tidsskrift.dk/NOMAD/article/view/144993. Acesso em: 9 jan. 2025.