SONG, D. Analysis of Problems in the Development of Online Teaching and Suggestions for Improvement. Science Insights Education Frontiers, [S. l.], v. 15, n. S1, p. 5, 2023. DOI: 10.15354/sief.23.s1.ab005. Disponível em: https://mail.bonoi.org/index.php/sief/article/view/1006. Acesso em: 16 apr. 2026.