@Article{acp-12-1377-2012,
AUTHOR = {He, K. and Zhao, Q. and Ma, Y. and Duan, F. and Yang, F. and Shi, Z. and Chen, G.},
TITLE = {Spatial and seasonal variability of PM$_{2.5}$ acidity at two Chinese megacities: insights into the formation of secondary inorganic aerosols},
JOURNAL = {Atmospheric Chemistry and Physics},
VOLUME = {12},
YEAR = {2012},
NUMBER = {3},
PAGES = {1377--1395},
URL = {http://www.atmos-chem-phys.net/12/1377/2012/},
DOI = {10.5194/acp-12-1377-2012}
}