1. S.H. Southworth, P.H. Kobrin, C.M. Truesdale, D. Lindle, S. Owaki, and D.A. Shirley, Phys. Rev. A 24, 2257 (1981).
2. S.H. Southworth, Ph.D. Thesis, Lawrence Berkeley Laboratory, University of California, 1982.
3. K. Siegbahn, C. Nordling. G. Johansson, J. Hedman, P.F. Heden, K. Hamrin, U. Gelius, T. Bergmark, L. O. Werme, R. Hanne, and Y, Baer, ESCA Applied to Free Molecules, North-Holland, 1969.
4. M. O. Krause, in Atomic Inner-Shell Processes (ed. B. Crasemann ), Academic Press, 1975 Vol. II, p. 34.
5. M.O. Krause, in Photoionization and other Probes of Many- Electron Interactions (ed. F.J, Wuilleumier) Plenum Press 1976, p. 133. 4a. W. Mehlhorn, in loc. cit. ref. 3b, p. 309.