SEY, K. Key Opportunities of E-Learning during COVID-19 Pandemic: A Case Study in One Cambodian High School. Journal of Mathematics Instruction, Social Research and Opinion, Bandung, Indonesia, v. 2, n. 3, p. 233–242, 2023. DOI: 10.58421/misro.v2i3.156. Disponível em: https://journal-gehu.com/index.php/misro/article/view/156. Acesso em: 14 may. 2026.