HASSAN, S. Virtual Classrooms during the Covid-19 pandemic. Pakistan BioMedical Journal, [S. l.], v. 4, n. 2, p. 2–3, 2021. DOI: 10.52229/pbmj.v4i2.66. Disponível em: https://www.pakistanbmj.com/journal/index.php/pbmj/article/view/66. Acesso em: 6 may. 2024.