1. W. P. Halperin, Rev. Mod. Phys. 58, 533 (1986).
2. S. H. M. Persson, L. Olofsson, and L. Gunnarsson, Appl. Phys. Lett. 74, 2546 (1999).
3. V. Yu. Irkhin and Yu. P. Irkhin, Electronic Structure, Correlation Effects, and Physical Properties of d- and f-Metals and Their Compounds (Ural Branch of the Russian Academy of Sciences, Yekaterinburg, Russia, 2004; Cambridge International Science, Cambridge, 2007).
4. D. P. Woodruff and T. A. Delchar, Modern Techniques of Surface Science (Cambridge University Press, Cambridge, 1986; Mir, Moscow, 1989).
5. G. Wertheim, in Electron and Ion Spectroscopy of Solids, Ed. by L. Fiermans, J. Vennik, and W. Dekeyser (Plenum, New York, 1978; Mir, Moscow, 1981).