GADE, S. Cooperation and collaboration as zones of proximal development within the mathematics classroom. NOMAD Nordic Studies in Mathematics Education, [S. l.], v. 15, n. 2, p. 49–68, 2010. DOI: 10.7146/nomad.v15i2.148243. Disponível em: https://tidsskrift.dk/NOMAD/article/view/148243. Acesso em: 8 jan. 2025.