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3. I. A. Shul'gin, Morphophysiological Adaptation of Plants to Light [in Russian], Moscow (1963).
4. V. P. Rvachev, Methods of Light-Scattering Media Optics in Physics and Biology [in Russian], Minsk (1978).
5. Yu. K. Ross, Radiation Regime and Architectonics of Vegetation [in Russian], Leningrad (1975).