HAJDUK-STELMACHOWICZ, Marzena; BEŁCH, Paulina; SZCZYGIEŁ, Elżbieta; FURA, Barbara; FRANKIEWICZ, Michał Piotr. Impact of COVID-19 pandemic on the air quality of polish cities – challenges for managers. Economics and Environment, Poland, v. 90, n. 3, p. 784, 2025. DOI: 10.34659/eis.2024.90.3.784. Disponível em: https://ekonomiaisrodowisko.pl/journal/article/view/784.. Acesso em: 19 feb. 2025.