@Article{acp-11-7893-2011,
AUTHOR = {Yang, F. and Huang, L. and Duan, F. and Zhang, W. and He, K. and Ma, Y. and Brook, J. R. and Tan, J. and Zhao, Q. and Cheng, Y.},
TITLE = {Carbonaceous species in PM$_{2.5}$ at a pair of rural/urban sites in Beijing, 2005–2008},
JOURNAL = {Atmospheric Chemistry and Physics},
VOLUME = {11},
YEAR = {2011},
NUMBER = {15},
PAGES = {7893--7903},
URL = {http://www.atmos-chem-phys.net/11/7893/2011/},
DOI = {10.5194/acp-11-7893-2011}
}