HOLMBERG, K.; HUVILA, I. Learning together apart: Distance education in a virtual world. First Monday, [S. l.], v. 13, n. 10, 2008. DOI: 10.5210/fm.v13i10.2178. Disponível em: https://firstmonday.org/ojs/index.php/fm/article/view/2178. Acesso em: 28 nov. 2022.