1. Woodruff, D.P. and Delchar, T.A., Modern Techniques of Surface Science, Cambridge: Cambridge Univ., 1986. Translated under the title Sovremennye metody issledovaniya poverkhnosti, Moscow: Mir, 1989.
2. Pop, S. and Sharodi, I., Fizichna Elektronika (Physical Electronics), L’viv: Evrosvit, 2001.
3. Unrberg, R.I.G., Landemark, E., and Chao, Y.C., J. Electron. Spectrosc. Relat. Phenom., 1995, vol. 75, p. 197.
4. Wach, A.L., Miller, T., Hsieh, T.C., et al., Phys. Rev. B: Condens. Matter Mater. Phys., 1985, vol. 32, p. 2326.
5. Farrell, H., Stucki, F., Anderson, J., et al., Phys. Rev. B: Condens. Matter Mater. Phys., 1984, vol. 30, p. 721.