NA, S.; JUNG, H. . Exploring University Instructors’ Challenges in Online Teaching and Design Opportunities during the COVID-19 Pandemic: A Systematic Review. International Journal of Learning, Teaching and Educational Research, [S. l.], v. 20, n. 9, p. 308–327, 2021. Disponível em: http://ijlter.net/index.php/ijlter/article/view/37. Acesso em: 22 may. 2026.