1. For a review, see Atomic Inner-Shell Processes, Vols. I and II, eds. B. Crasemann (Academic Press, New York, 1975).
2. See e.g. J.D. Garcia, R.J. Fortner, and T.M. Kavanagh, Rev. Mod. Phys. 45, 111 (1973).
3. F.H. Read, in the Proc. of the IX International Conference on the Physics of Electronic and Atomic Collisions, Seattle, 1975, tobe published.
4. R.V. Vendrinskiiand V.V. Kolesnikov, Bull. Acad. Sci. USSR, Phys. Ser. 31, 904 (1968).
5. M. H. Chen and B. Crasemann, Phys. Rev. A 8, 7(1973).