Kicklighter, D. W., Bruno, M., Dönges, S., Esser, G., Heimann, M., Helfrich, J., Ift, F., Joos, F., Kaduk, J., Kohlmaier,
G. H., Mcguire, A. D., Melillo, J. M., Meyer, R., Moore Iii, B., Nadler, A., Prentice, I. C., Sauf, W., Schloss, A. L., Sitch,
S., Wittenberg, U., & Würth, G. (1999). A first-order analysis of the potential
role of CO2 fertilization to affect the global carbon budget: a comparison of four terrestrial biosphere models. Tellus, Series B - Chemical and Physical Meteorology, 51(2),
343-366. doi:10.1034/j.1600-0889.1999.00017.x.