1. Larcher, W. Physiological Plant Ecology (Springer, Berlin, 1980).
2. Richards, P. W. The Tropical Rain Forest (Cambridge Univ. Press, Cambridge, 1952).
3. Coley, P. D., Bryant, J. P. & Chapin, III, F. S. Science 230, 895–899 (1985).
4. Rosenthal, G. A. & Janzen, D. J. Herbivores: Their Interaction with Secondary Plant Metabolites (Academic, New York, 1979).
5. Crawley, M. J. Herbivory: the Dynamics of Animal-Plant Interactions (Univ. California Press, Berkeley, 1983).