WAKISAKA, M. Face-to-face tandem and etandem: differences that influence the maintenance of tandem learning activities. Revista do GEL, [S. l.], v. 15, n. 3, p. 42–57, 2018. DOI: 10.21165/gel.v15i3.2408. Disponível em: https://revistas.gel.org.br/rg/article/view/2408. Acesso em: 22 lug. 2024.