1. Allen, L.H., Jr., Stewart, D.W., Lemon, E.R.: Photosynthesis in plant canopies-effect of light response curves and radiation source geometry. Photosynthetica 8, 184?207 (1974)
2. Anderson, M.D.: Stand structure and light penetration. II. A theoretical analysis. J. Appl. Ecol. 3, 41?54 (1966)
3. Biscoe, P.V., Scott, R.K., Monteith, J.L.: Barley and its environment. III. Carbon budget of the stand. J. Appl. Ecol. 12, 269?293 (1975)
4. Björkman, O.: Comparative studies on photosynthesis in higher plants. In: Photophysiology, Vol. 8 (A. Giese ed.), pp. 1?63. New York: Academic Press 1973
5. Björkman, O., Mooney, H.A., Ehleringer, J.R.: Photosynthetic responses of plants from habitats with contrasting thermal environments. Carnegie Inst. Wash. Year Book 74, 743?748 (1975)