@Article{acp-17-235-2017,
AUTHOR = {Houweling, S. and Bergamaschi, P. and Chevallier, F. and Heimann, M. and Kaminski, T. and Krol, M. and Michalak, A. M. and Patra, P.},
TITLE = {Global inverse modeling of {CH}$_4$ sources and sinks:\hack{\newline} an overview of methods},
JOURNAL = {Atmospheric Chemistry and Physics},
VOLUME = {17},
YEAR = {2017},
NUMBER = {1},
PAGES = {235--256},
URL = {https://acp.copernicus.org/articles/17/235/2017/},
DOI = {10.5194/acp-17-235-2017}
}