GOGUS, AYTAC. Adaptation of Activity Theory Framework for Effective Online Learning Experiences: Bringing Cognitive Presence with Teaching and Social Presences in Online Courses. Online Learning, Boston, MA, v. 27, n. 2, 2023. DOI: 10.24059/olj.v27i2.3073. Disponível em: https://olj.onlinelearningconsortium.org/index.php/olj/article/view/3073. Acesso em: 30 mar. 2026.