1. Forecasting of air quality in Delhi using principal component regression technique;Anikender;Atmos. Pollut. Res.,2011
2. Beijing Smog: when Growth Trumps Life in China;BBC,2013
3. Air Quality Assessment Report IV;Center for Statistical Science of Peking University (CSSPKU),2017
4. Rough set combine with binary glowworm swarm optimization for key haze influence factors;Cheng;Syst. Eng. Theor. Pract.,2017
5. 4% of Chinese Cities Report Clean Air;Chinadaily,2014