@Article{amt-8-4851-2015,
AUTHOR = {Liu, F. and Duan, F. K. and He, K. B. and Ma, Y. L. and Rahn, K. A. and Zhang, Q.},
TITLE = {An enhanced procedure for measuring organic acids and   methyl esters in PM$_{2.5}$},
JOURNAL = {Atmospheric Measurement Techniques},
VOLUME = {8},
YEAR = {2015},
NUMBER = {11},
PAGES = {4851--4862},
URL = {https://amt.copernicus.org/articles/8/4851/2015/},
DOI = {10.5194/amt-8-4851-2015}
}