DOUGHTY, Philip L.; SPECTOR, J. Michael; YONAI, Barbara A. Time, Efficacy and Cost Considerations of e-Collaboration in Online University Courses. Revista Brasileira de Aprendizagem Aberta e a Distância, [S. l.], v. 2, 2008. DOI: 10.17143/rbaad.v2i0.153. Disponível em: https://seer.abed.net.br/RBAAD/article/view/153. Acesso em: 21 ago. 2025.