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2. “Surface properties of materials” ed. L.L. Levenson, North Holland Publ. Co., Amsterdam 1975
3. “Characterization of Solid Surfaces” ed. P.P. Kane, G. B. Larrabee, Plenum Press, New York 1974
4. “Electron Spectroscopy for Surface Analysis” ed. H. Ibach, Springer Verlag, Berlin 1977
5. Haber, in “Chemical and Physical Aspects of Catalytic Oxidation”, ed. J. Portefaix and P. Figueras, CNRS Paris 1980, p. 336