JIE, C. Y.; ALI, N. M. . COVID-19: What are the Challenges of Online Learning? A Literature Review. International Journal of Advanced Research in Future Ready Learning and Education, [S. l.], v. 23, n. 1, p. 23–29, 2021. DOI: 10.37934/frle.23.1.2329. Disponível em: https://akademiabaru.com/submit/index.php/frle/article/view/3960. Acesso em: 23 nov. 2024.