VOROBEL, Oksana; KIM, Deoksoon. Language Teaching at Distance: A Comprehensive Overview of Research. CALICO Journal, [S. l.], v. 29, n. 3, p. 548–562, 2013. DOI: 10.11139/cj.29.3.548-562. Disponível em: https://journal.equinoxpub.com/Calico/article/view/17046.. Acesso em: 14 aug. 2024.