WEIS, Lidija. Theoretical approach to E-learning quality. Economics Ecology Socium, [S. l.], v. 5, n. 1, p. 33–45, 2021. DOI: 10.31520/2616-7107/2021.5.1-4. Disponível em: https://ees-journal.com/index.php/journal/article/view/158. Acesso em: 14 aug. 2026.