CLARK, Cynthia. Comparing Asynchronous and Synchronous Video versus Text Based Discussions in an Online Teacher Education Course. Online Learning, Boston, MA, v. 19, n. 3, 2015. DOI: 10.24059/olj.v19i3.668. Disponível em: https://olj.onlinelearningconsortium.org/index.php/olj/article/view/668. Acesso em: 14 apr. 2026.