Zahn, A. Atmospheric Chemistry, Max Planck Institute for Chemistry, Max Planck Society;
Zahn, A., Neubert, R., & Platt, U. (2000). Fate of long-lived trace species near the Northern Hemispheric tropopause. 2. Isotopic composition of carbon dioxide (13CO2, 14CO2 and C18O16O). Journal of Geophysical Research, 105, 6719-6735.