1. M.R.C. McDowell, “Electron Scattering by Atoms,” in Atomic Processes and Applications, edited by P.G. Burke and B.L. Moiseiwitsch (North-Holland, Amsterdam, New York, 1976), pp. 342–405. J. Berkowitz, Photoabsorption, Photoionization, and Photoelectron Spectroscopy (Academic Press, New York, 1979).
2. M.R.C. McDowell, “Electron Scattering by Atoms,” in Atomic Processes and Applications, edited by P.G. Burke and B.L. Moiseiwitsch (North-Holland, Amsterdam, 1976), 15.6.
3. ibidem I6.14
4. P. Letardi, R. Camilloni, and G. Stefani, Phys. Rev. B 40, 3311 (1989) and references quoted therein.
5. M. Inokuti, Rev. Mod. Phys. 43, 297 (1971).