@article {20687, title = {Traffic restrictions in Beijing during the Sino-African Summit 2006: aerosol size distribution and visibility compared to long-term in situ observations}, journal = {Atmospheric Chemistry and Physics}, volume = {8}, number = {24}, year = {2008}, note = {Times Cited: 30Wehner, Birgit/C-2650-2014; Cheng, Yafang/F-9362-2010; Su, Hang/A-6226-2010Cheng, Yafang/0000-0003-4912-9879; Su, Hang/0000-0003-4889-1669331680-7324}, month = {2008}, pages = {7583-7594}, isbn = {1680-7316}, author = {Cheng, Y. F. and Heintzenberg, J. and Wehner, B. and ZJ Wu and H. Su and Hu, M. and Mao, J. T.} }