YU, J.; ZHANG, R. A Review of Shadow Education. Science Insights Education Frontiers, [S. l.], v. 11, n. 2, p. 1579–1593, 2022. DOI: 10.15354/sief.22.re058. Disponível em: https://bonoi.org/index.php/sief/article/view/720. Acesso em: 31 oct. 2025.