1. see, e.g., Desorption Induced by Electronic Transitions, DIET-I, edited by N.H. Tolk, M.M. Traum, J.C. Tully and T.E. Madey, ( Springer, Berlin 1983 )
2. D. Menzel, this volume
3. Z.W. Gortel, this volume;
4. Z.W. Gortel, H.J. Kreuzer, P. Feulner and D. Menzel, Phys. Rev. B35 (I9B7) 8951;
5. D.R. Jennison, this volume