1. Y. X. Liang, Y. J. Chen, and T. H. Wang, Appl. Phys. Lett. 85, 666 (2004).
2. V. S. Kovivchak and N. A. Davletkil’deev, Pis’ma Zh. Tekh. Fiz. 35(10), 12 (2009) [Tech. Phys. Lett. 35, 446 (2009)].
3. C. D. Wagner, W. M. Riggs, L. E. Davis, and G. E. Moulder, Handbook of X-Ray Photoelectron Spectroscopy (Eden Prairie, PEI, 1986), p. 10.
4. V. V. Bolotov, Yu. A. Sten’kin, N. A. Davletkil’diev, et al., Fiz. Tekh. Poluprovodn. 43, 100 (2009) [Semiconductors 43, 92 (2009)].
5. E. P. Domashevskaya, S. V. Ryabtsev, S. Yu. Turishchev, et al., Kondens. Sredy Mezhfazn. Granitsy 10(2), 98 (2008).