BULLEN, Mark. Participation and Critical Thinking in Online University Distance Education. International Journal of E-Learning & Distance Education / Revue internationale du e-learning et la formation à distance, [S. l.], v. 13, n. 2, p. 1–32, 2007. Disponível em: https://ijede.ca/index.php/jde/article/view/140. Acesso em: 29 apr. 2024.