@article {632204, title = {Anthropogenic drivers of 2013-2017 trends in summer surface ozone in China }, journal = {PNAS}, volume = {116}, year = {2019}, pages = {422-427}, url = {https://www.pnas.org/content/116/2/422}, author = {Li, K. and Jacob, D and Liao, H. and Shen, L. and Zhang, Q and Bates, K} }