BILLINGTON, Mary G.; GABRIELSEN, Egil. The older the better? Are younger Norwegian adults losing ground on basic numeracy skills?. NOMAD Nordic Studies in Mathematics Education, [S. l.], v. 22, n. 1, p. 45–64, 2017. DOI: 10.7146/nomad.v22i1.148757. Disponível em: https://tidsskrift.dk/NOMAD/article/view/148757. Acesso em: 6 dec. 2025.