OSTAD, S. A. Strategic competence: issues of task-specific strategies in arithmetic. NOMAD Nordic Studies in Mathematics Education, [S. l.], v. 5, n. 3, p. 7–32, 1997. DOI: 10.7146/nomad.v5i3.146501. Disponível em: https://tidsskrift.dk/NOMAD/article/view/146501. Acesso em: 9 jan. 2025.