@Article{acp-9-3641-2009,
AUTHOR = {Chen, D. and Zhou, B. and Beirle, S. and Chen, L. M. and Wagner, T.},
TITLE = {Tropospheric NO$_{2}$ column densities deduced from zenith-sky DOAS measurements in Shanghai, China, and their application to satellite validation},
JOURNAL = {Atmospheric Chemistry and Physics},
VOLUME = {9},
YEAR = {2009},
NUMBER = {11},
PAGES = {3641--3662},
URL = {http://www.atmos-chem-phys.net/9/3641/2009/},
DOI = {10.5194/acp-9-3641-2009}
}