@article {609407, title = {Detection of critical PM2.5 emission sources and their contributions to a heavy haze episode in Beijing, China, using an adjoint model}, journal = {Atmospheric Chemistry \& Physics}, volume = {18}, number = {9}, year = {2018}, pages = {6241-6258}, url = {https://www.atmos-chem-phys.net/18/6241/2018/acp-18-6241-2018.html}, author = {Shixian Zhai and Xingqin An and Tianliang Zhao and Zhaobin Sun and Wang, Wei and Qing Hou and Zengyuan Guo and Chao Wang} }