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2. M.P. Seah, W.A. Dench: Surf. Interf. Anal. I (1979). Compilation of experimental data determined with various electron energies for a large variety of materials
3. Springer Ser. Surf. Sci.;M.A. Hove Van,1986
4. K. Christmann, G. Ertl, O. Schober: Surf. Sci. 40, 61 (1973)
5. G. Ertl: In Molecular Processes on Solid Surfaces, ed. by E. Dranglis, R.D. Gretz, R.I. Jaffee (McGraw-Hill, New York 1969) p. 147