@Article{acp-4-413-2004,
AUTHOR = {Rayner, R. J},
TITLE = {Optimizing  CO$_{2}$ observing networks  in the presence of model  error: results from TransCom 3},
JOURNAL = {Atmospheric Chemistry and Physics},
VOLUME = {4},
YEAR = {2004},
NUMBER = {2},
PAGES = {413--421},
URL = {http://www.atmos-chem-phys.net/4/413/2004/},
ISSN = {1680-7316}
}