HEDRÉN, R. Alternatives to traditional algorithms in elementary mathematics instruction. NOMAD Nordic Studies in Mathematics Education, [S. l.], v. 4, n. 2-3, p. 51–83, 1996. DOI: 10.7146/nomad.v4i2-3.146428. Disponível em: https://tidsskrift.dk/NOMAD/article/view/146428. Acesso em: 9 jan. 2025.