1. T. D. Harris, in: Ultrasensitive Laser Spectroscopy, D. Kliger, ed., Academic Press, New York (1983).
2. B. F. Kuntsevich, A. N. Pisarchik, V. N. Chizhevskii, and V. V. Churakov, Zh. Prikl. Spektrosk.,39, No. 2, 220?225 (1983).
3. L. N. Krasnoperov, E. N. Chesnokov, and V. N. Panfilov, Chem. Phys.,89, 297?305 (1984).
4. A. I. Chichinin and L. N. Krasnoperov, Chem. Phys. Lett.,115, No. 3, 343?348 (1985).
5. A. I. Chichinin and L. N. Krasnoperov, Chem. Phys. Lett.,124, No. 1, 8?13 (1986).