1. Brenninkmeijer, C. A. M.: Measurement of the abundance of 14CO in the atmosphere and the 13C / 12C and 18O / 16O ratio of atmospheric CO with applications in New Zealand and Antarctica, J. Geophys. Res., 98, 614, 10510–10595, 1993.
2. Brenninkmeijer, C. A. M. and Röckmann, T.: Principal factors determining ratio of atmospheric CO as derived from observations in the southern hemispheric troposphere and lower statosphere, J. Geophys. Res., 102, 477–485, 1997.
3. Brenninkmeijer, C. A. M., Röckmann, T., Bräunlich, M., Jöckel, P., and Bergamaschi, P.: Review of progress in isotope studies of atmospheric carbon monoxide, Chemosphere-Global Chang. Sci., 1, 33–52, 1999.
4. Crutzen, P. and Zimmermann, P.: The changing photochemistry of the troposphere, Tellus B, 43 AB, 136–151, 1991.
5. Hartmann, D. L., Tank, A. M. G. K., Rusticucci, M., Alexander, L. V., Brönnimann, S., Charabi, Y., Dentener, F. J., Dlugokencky, E. J., Easterling, D. R., Kaplan, A., Soden, B. J., Thorne, P. W., Wild, M., and Zhai, P. M.: Observations: Atmosphere and Surface, in: Climate Change 2013 – The Physical Science Basis. Contribution of Working Group I to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change, edited by: Stocker, T. F., Qin, D., Plattner, G.-K., Tignor, M., Allen, S. K., Boschung, J., Nauels, A., Xia, Y., Bex, V., and Midgley, P. M., 159–254, Cambridge University Press, Cambridge, United Kingdom and New York, NY, USA, Cambridge, 2014.