1. V. E. Henrich and P. A. Cox, The Surface Science of Metal Oxides (Cambridge Univ. Press, Cambridge, 1994).
2. Physics and Chemistry of Alkali Metal Adsorption, Ed. by H. P. Bonzel, A. M. Bradshow, and G. Ertl (Elsevier, Amsterdam, 1989).
3. S. Yu. Davydov and I. V. Noskov, Pis’ma Zh. Tekh. Fiz. 27(20), 1 (2001) [Tech. Phys. Lett. 27, 844 (2001)].
4. R. Casanova, K. Prabhakaran, and G. Thornton, J. Phys.: Condens. Matter 3, S91 (1991).
5. H. Onishi, T. Aruga, C. Egawa, and Y. Iwasawa, Surf. Sci. 199, 54 (1988).