BRÅTING, Kajsa; MADEJ, Lars; HEMMI, Kirsti. Development of algebraic thinking: opportunities offered by the Swedish curriculum and elementary mathematics textbooks. NOMAD Nordic Studies in Mathematics Education, [S. l.], v. 24, n. 1, p. 27–49, 2019. DOI: 10.7146/nomad.v24i1.148996. Disponível em: https://tidsskrift.dk/NOMAD/article/view/148996. Acesso em: 5 dec. 2025.