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[4] [4] I. V. Hertel, in Adv. Chem. Phys., Vol. The Excited State in Chemical Physics, Part 2 (ed. J. Wm. McGowan, Interscience, New York, 1981), p. 341

[5] [5] H. W. Breckenridge, H. Umemoto, in Adv. Chem. Phys. Vol. 50: Dynamics of the Excited State (ed. K. P. Law ley, Interscience, New York, 1982) , p. 325

[6] [6] I. V. Hertel, ibid, p. 475

[7] [7] J. T. Yardley, Introduction to Molecular Energy Transfer (Academie, New York, 1980)