FREIMAN, V.; MANUEL, D. Relating Students’ Perceptions of Interest and Difficulty to the Richness of Mathematical Problems Posted on the CAMI Website. Quadrante, [S. l.], v. 24, n. 2, p. 61–84, 2015. DOI: 10.48489/quadrante.22922. Disponível em: https://quadrante.apm.pt/article/view/22922. Acesso em: 10 mar. 2025.