FAN, Ziyan. Factor Analysis of Air Quality Index. International Journal of Global Economics and Management, [S. l.], v. 8, n. 2, p. 65–71, 2025. DOI: 10.62051/ijgem.v8n2.08. Disponível em: https://ijgem.org/index.php/ojs/article/view/176. Acesso em: 2 may. 2026.