1. M.D. Levenson:Introduction to Nonlinear Laser Spectroscopy (Academic, New York 1982)
2. Y.R. Shen:The Principles of Nonlinear Optics (Wiley, New York 1984)
3. V.F. Kamalov, N.I. Koroteev, B.N. Toleutaev: InTime Resolved Spectroscopy, ed. by R.J.H. Clark, R.E. Hester (Wiley, Chichester 1989) p. 255, and references therein
4. S.A. Payne, R.M. Hochstrasser: J. Chem. Phys.90, 2068 (1986)
5. S. Matsunuma, S. Yamaguchi, C. Hirose, S. Maeda: J. Phys. Chem.92, 1777 (1988) S. Matsunuma, N. Akamatsu, T. Kamisuki, Y. Adachi, S. Maeda, C. Hirose: J. Chem. Phys.88, 2956 (1988)