@Article{acp-8-5603-2008,
AUTHOR = {Napelenok, S. L. and Pinder, R. W. and Gilliland, A. B. and Martin, R. V.},
TITLE = {A method for evaluating spatially-resolved NO$_{x}$ emissions using Kalman filter inversion, direct sensitivities, and space-based NO$_{2}$ observations},
JOURNAL = {Atmospheric Chemistry and Physics},
VOLUME = {8},
YEAR = {2008},
NUMBER = {18},
PAGES = {5603--5614},
URL = {http://www.atmos-chem-phys.net/8/5603/2008/},
DOI = {10.5194/acp-8-5603-2008}
}