JEREMIC, Zoran; MILIKIC, Nikola; JOVANOVIC, Jelena; BRKOVIC, Mirjana; RADULOVIC, Filip. Using Online Presence to Improve Online Collaborative Learning. International Journal of Emerging Technologies in Learning (iJET), [S. l.], v. 7, n. S1, p. pp. 28–35, 2012. DOI: 10.3991/ijet.v7iS1.1918. Disponível em: https://online-journals.org/index.php/i-jet/article/view/1918. Acesso em: 25 nov. 2024.