CHANG, Xin. Research on the Reform of Online Teaching Mode in Colleges and Universities. Journal of Education and Educational Research, [S. l.], v. 1, n. 1, p. 33–35, 2022. DOI: 10.54097/jeer.v1i1.2280. Disponível em: https://drpress.org/ojs/index.php/jeer/article/view/2280. Acesso em: 4 jun. 2026.