HEDRÉN, R. Alternatives to standard algorithms – a study of three pupils during three and a half years. NOMAD Nordic Studies in Mathematics Education, [S. l.], v. 8, n. 1, p. 35–64, 2000. DOI: 10.7146/nomad.v8i1.146703. Disponível em: https://tidsskrift.dk/NOMAD/article/view/146703. Acesso em: 9 jan. 2025.