ROVAI, Alfred P.; BARNUM, Kirk T. On-Line Course Effectiveness: An Analysis of Student Interactions and Perceptions of Learning. International Journal of E-Learning & Distance Education / Revue internationale du e-learning et la formation à distance, [S. l.], v. 18, n. 1, p. 57–73, 2007. Disponível em: https://www.ijede.ca/index.php/jde/article/view/121. Acesso em: 19 apr. 2024.