@Article{acp-8-2701-2008,
AUTHOR = {Xie, S. D. and Liu, Z. and Chen, T. and Hua, L.},
TITLE = {Spatiotemporal variations of ambient PM$_{10}$ source contributions in Beijing in 2004 using positive matrix factorization},
JOURNAL = {Atmospheric Chemistry and Physics},
VOLUME = {8},
YEAR = {2008},
NUMBER = {10},
PAGES = {2701--2716},
URL = {http://www.atmos-chem-phys.net/8/2701/2008/},
DOI = {10.5194/acp-8-2701-2008}
}