LI, X. Research on Micro-class Resources in the PBL Model. Science Insights Education Frontiers, [S. l.], v. 8, n. S1, p. 7, 2021. DOI: 10.15354/sief.21.s1.ab018. Disponível em: https://mail.bonoi.org/index.php/sief/article/view/341. Acesso em: 16 apr. 2026.