SABA, Farhad. Research in Distance Education: A Status Report. The International Review of Research in Open and Distributed Learning, [S. l.], v. 1, n. 1, 2000. DOI: 10.19173/irrodl.v1i1.4. Disponível em: https://www.irrodl.org/index.php/irrodl/article/view/4. Acesso em: 28 mar. 2024.