VÁZQUEZ, Esteban; FOMBONA, Javier; FERNÁNDEZ, Alberto. Virtual attendance: Analysis of an audiovisual over IP system for distance learning in the Spanish Open University (UNED). The International Review of Research in Open and Distributed Learning, [S. l.], v. 14, n. 3, p. 402–426, 2013. DOI: 10.19173/irrodl.v14i3.1430. Disponível em: https://www.irrodl.org/index.php/irrodl/article/view/1430. Acesso em: 19 apr. 2024.