Remarks on the use of 13C and 18O isotopes in atmospheric CO2 to quantify biospheric carbon fluxes
Ph. Ciais, M. Cuntz, M. Scholze, F. Mouillot, Ph. Peylin, and V. Gitz, In "Stable Isotopes and Biosphere-Atmosphere Exchange", edited by L.B. Flaganan, D.E. Pataki and J. Ehrlinger, Academic Press, San Diego.