Analysis of Contradictions in Online Collaborative Learning using Activity Theory as Analytical Framework. Jurnal Teknologi, [S. l.], v. 68, n. 2, 2014. DOI: 10.11113/jt.v68.2910. Disponível em: https://journals.utm.my/jurnalteknologi/article/view/2910.. Acesso em: 8 may. 2024.