ASHMA SHAMAIL; SHANTI REKHA RAO. COVID-19 and Lockdown: Anxiety Levels and Sleep Difficulties among School Students in Saudi Arabia. Pegem Journal of Education and Instruction, [S. l.], v. 13, n. 2, p. 386–394, 2023. Disponível em: https://www.pegegog.net/index.php/pegegog/article/view/2877. Acesso em: 23 sep. 2025.