1. T. Yajima and Y. Taira, J. Phys. Soc. Jpn.,47, 1620 (1979).
2. V. S. Kuz'min and A. P. Saiko, in: Proc. of the Third Symposium: Ultrarapid Processes in Spectroscopy [in Russian], published by the Institute of Physics of the Belorussian Academy of Sciences, Minsk (1984), pp. 183?187.
3. B. D. Fainberg, see [2], pp. 173?177.
4. B. D. Fainberg, Opt. Spektrosk.,55, 1098 (1983).
5. A. P. Saiko, Dokl. Akad. Nauk BSSR,28, 324 (1984).