ARIAS, P. A.; ARMAS ERAZO, A.; ARÉVALO PERUANO, A.; ANDRADE CALLE, H. Virtual classes and their effect on the physical and mental state of university students. Kronos – The Language Teaching Journal, [S. l.], v. 2, n. 1, p. 60–67, 2021. DOI: 10.29166/kronos.v2i1.3026. Disponível em: https://revistadigital.uce.edu.ec/index.php/KronosJournal/article/view/3026. Acesso em: 17 may. 2024.