Reference

Duc H, Salter D, Azzi M, Jiang N, Warren L, Watt S, Riley M, White S, Trieu T, Tzu-Chi Chang L, Barthelemy X, Fuchs D & Nguyen H (2021). The effect of lockdown period during the COVID-19 pandemic on air quality in Sydney region, Australia. International Journal of Environmental Research and Public Health 18(7):3528.