R. A. Roomaney, “Estimating the burden of disease attributable to ambient air pollution (ambient PM2.5 and ambient ozone) in South Africa for 2000, 2006 and 2012”, S Afr Med J, vol. 112, no. 8B, pp. 705–717, Sep. 2022, doi: 10.7196/SAMJ.2022.v112i8b.16483.