Crutzen, P. J. Atmospheric Chemistry, Max Planck Institute for Chemistry, Max Planck Society;
Bergamaschi, P., Hein, R., Heimann, M., & Crutzen, P. J. (2000). Inverse modelling of the global CO cycle: 1. Inversion of CO mixing ratios. Journal of Geophysical Research, 105, 1909-1927.