e C \ er\, Andres RJ, Boden T, et al. The global carbon budget 1959-2011. Earth System Science Data. 2013;5:165-185. doi:10.5194/essd-5-165-2013.
Ciais P, Dolman AJ, Bombelli A, et al. Current systematic carbon-cycle observations and the need for implementing a policy-relevant carbon observing system. Biogeosciences. 2014;11:3547-3602. doi:10.5194/bg-11-3547-2014.
