LEUNG, C. H. .; CHAN, W. T. Y. Lack of Teachers’ Facial Expression in the COVID-19 Pandemic: Problems and Ways to Solutions. Journal of Asian Scientific Research, [S. l.], v. 12, n. 2, p. 62–69, 2022. DOI: 10.55493/5003.v12i2.4492. Disponível em: https://archive.aessweb.com/index.php/5003/article/view/4492. Acesso em: 8 aug. 2022.