1. M.A. Kumaklov and F.F. Komarov, Energy Loss and Ion Ranges in Solids, Gordon and Breach, New York (1981).
2. Y.H. Ohtsuki, Charged Beam Interactions with Solids, Taylor and Francis, New York (1983).
3. P. SchattSchneider, Fundamentals of Inelastic Electron Scattering, Springer Verlag, New York (1986).
4. J. Schou Scanning Microsc.2 (1988) 607.
5. S. Tougaard, Surface and Interface Analysis, vol.12, Wiley, New York (1988).