Update of the COVID-19 Higher Education Literature Database (CHELD v2). Journal of Applied Learning and Teaching, [S. l.], v. 4, n. 1, p. 134–137, 2021. DOI: 10.37074/jalt.2021.4.1.22. Disponível em: https://jalt.open-publishing.org/index.php/jalt/article/view/399. Acesso em: 5 jun. 2026.