Schulze, E. D., Hall, A. E., Lange, O. L., Evenari, M., Kappen, L., & Buschbom, U. (1980).
Long-term effects of drought on wild and cultivated plants in the Negev Desert. I. Maximal rates of net photosynthesis. Oecologia, 45(1), 11-18. doi:10.1007/BF00346700.