What’s new with APOS theory? A look into levels and Totality. Advances of Research in Mathematics Education, [S. l.], n. 21, p. 9–21, 2022. DOI: 10.35763/aiem21.4245. Disponível em: https://aiem.es/aiem/article/view/n21-oktac. Acesso em: 20 may. 2026.