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3. M. W. Roberts and C. S. McKee, Chemistry of the Metal-Gas Interface (Clarendon, Oxford, 1978).
4. M. Golze, M. Grunze, and W. Unertl, Progr. Surf. Sci. 22, 101 (1986).
5. A. Ya. Rozovskii, Heterogeneous Chemical Reactions (Nauka, Moscow, 1980) [in Russian].