@Article{acp-11-921-2011,
AUTHOR = {Tang, J. and Zhuang, Q.},
TITLE = {Technical Note: Propagating correlations in atmospheric inversions using different Kalman update smoothers},
JOURNAL = {Atmospheric Chemistry and Physics},
VOLUME = {11},
YEAR = {2011},
NUMBER = {3},
PAGES = {921--929},
URL = {http://www.atmos-chem-phys.net/11/921/2011/},
DOI = {10.5194/acp-11-921-2011}
}