ABBAS, I. I.; KHAN, I.; GINIGE, T. A. .; ABDELKADER, A. Air Quality Transformation in Twelve Major Cities during Covid-19 Lockdowns: A Global Assessment. International Journal of Data Science and Advanced Analytics, [S. l.], v. 5, n. 1, p. 264–271, 2023. DOI: 10.69511/ijdsaa.v5i5.211. Disponível em: https://ijdsaa.com/index.php/welcome/article/view/211. Acesso em: 30 jan. 2026.