@Article{acp-12-10015-2012,
AUTHOR = {Errera, Q. and M\'enard, R.},
TITLE = {Technical Note: Spectral representation of spatial correlations in  variational assimilation with grid point models and application to the Belgian  Assimilation System for Chemical Observations (BASCOE)},
JOURNAL = {Atmospheric Chemistry and Physics},
VOLUME = {12},
YEAR = {2012},
NUMBER = {21},
PAGES = {10015--10031},
URL = {http://www.atmos-chem-phys.net/12/10015/2012/},
DOI = {10.5194/acp-12-10015-2012}
}