EM, S. Challenges of online learning during the COVID-19 pandemic: A survey of Cambodian high school students. Cambodian Journal of Educational Research, [S. l.], v. 1, n. 2, p. 96–108, 2021. DOI: 10.62037/cjer.2021.01.02.09. Disponível em: https://cjerjournal.com/index.php/cjer/article/view/120. Acesso em: 13 nov. 2026.