Churkina, G., Brovkin, V., von Bloh, W., Trusilova, K., Jung, M., Dentener, F. (2009): Synergy of rising nitrogen depositions and atmospheric CO2 on land carbon uptake moderately offsets global warming. - Global Biogeochemical Cycles, 23, GB4027.https://doi.org/10.1029/2008GB003291