The Challenges of E-Learning Implementation During the Covid-19 Pandemic in Senior High School. Journal of Digital Learning and Education, Deli Serdang, Indonesia, v. 1, n. 3, p. 150–157, 2021. DOI: 10.52562/jdle.v1i3.257. Disponível em: https://www.journal.moripublishing.com/index.php/jdle/article/view/257. Acesso em: 25 jul. 2026.