63.T. F. Keenan, X. Luo, M. G. De Kauwe, B. E. Medlyn, I. C. Prentice, B. D. Stocker, N. G. Smith,C. Terrer, H. Wang, Y. Zhang, S. Zhou. 2023. A constraint on historic growth in global photosynthesis due to rising CO2. Nature Climate Change, 13: 1376-1381.