1. V. S. Letokhov and V. P. Chebotayev, “Nonlinear Laser Spectroscopy”, Vol.4, Springer Series in Optical Sciences, Springer-Verlag, Berlin, Heidelberg, New York (1977).
2. D. H. Auston and K. B. Eisenthal, eds., “Ultrafast Phenomena IV”, Vol.38, Springer Series in Chemical Physics, Springer-Verlag, Berlin, Heidelberg, New York, Tokyo (1984.
3. V. S. Letokhov, “Laser Photoionization Spectroscopy”, Academic Press, Orlando (1987).
4. V. S. Letokhov, in “Tunable Lasers and Applications”, A. Mooradian, T. Jaeger, and P. Stokseth eds., Springer Series in Optical Sciences, Vol.3, p.122, Springer-Verlag, Berlin, Heidelberg, New York (1976)
5. V. S. Letokhov, in “Chemical and Biochemical Applications of Lasers”, Vol.5, p.1, C. B. Moore, ed., Academic Press, New York, London etc. (1980).