GRIFFON, Nathalie. Understanding Distance Education: A Framework for the Future. International Journal of E-Learning & Distance Education / Revue internationale du e-learning et la formation à distance, [S. l.], v. 5, n. 1, p. 81–85, 1990. Disponível em: https://ijede.ca/index.php/jde/article/view/378. Acesso em: 23 nov. 2024.