GJONE, Gunnar. Review – Windows on mathematical meanings. NOMAD Nordic Studies in Mathematics Education, [S. l.], v. 5, n. 3, p. 59–65, 1997. DOI: 10.7146/nomad.v5i3.146637. Disponível em: https://tidsskrift.dk/NOMAD/article/view/146637. Acesso em: 6 dec. 2025.