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2. Yu. F. Migal, ibid.,26, 2755–2766 (1993).
3. Yu. F. Migal, ibid.,26, 2767–2775 (1993).
4. A. N. Tikhonov and V. Ya. Arsenin,Methods of Solving Ill-Posed Problems [in Russian], Nauka, Moscow (1979).
5. V. P. Baltakhinov,Modern Vibrational Spectroscopy of Inorganic Compounds [in Russian], Nauka, Novosibirsk (1990), pp. 243–266.