Evenari, M., Schulze, E. D., Lange, O. L., Kappen, L., & Buschbom, U. (1976). Plant
production in arid and semi-arid areas. In O. L. Lange, L. Kappen, & E.-D. Schulze (Eds.),
Water and Plant Life. Ecological Studies (Analysis and Synthesis) (pp. 439-451). Berlin,
Heidelberg: Springer.