1. J.A.R. Samson, Atomic Photoionization, in: “Handbuch der Physik, Vol. 31”, W. Mehlhorn, ed., Springer, Berlin (1980).
2. A.F. Starace, Theory of Atomic Photoionization, ibid.
3. M.O. Krause, Electron Spectrometry of Atoms and Molecules, in: “Synchrotron Radiation Research”, H. Winnick and S. Doniach, eds., Plenum, New York (1980).
4. F.J. Wuilleumier, Atomic Physics with Synchrotron Radiation, in: “Atomic Physics 7, ” D. Kleppner and F.M. Pipkin, eds., Plenum, New York (1981).
5. H.P. Kelly and S.L. Carter, Phys. Scr. 21, 448 (1980).