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2. B. I. Stepanov and V. P. Gribkovskii, Introduction to the Theory of Luminescence [in Russian], Minsk (1963).
3. A. M. Sarzhevskii and A. N. Sevchenko, Anisotropy of Light Absorption and Emission by Molecules [in Russian], Minsk (1971).
4. V. A. Gaisenok and A. M. Sarzhevskii, Anisotropy of Absorption and Luminescence of Polyatomic Molecules, [in Russian], Minsk (1986).
5. S. McGlynn, T. Adzumi, and M. Kinosita, Molecular Spectroscopy of the Triplet State [in Russian], Moscow (1972).