1. V. V. Kaminskiĭ and S. M. Solov’ev, Fiz. Tverd. Tela (St. Petersburg) 43(3), 423 (2001) [Phys. Solid State 43 (3), 439 (2001)].
2. V. V. Kaminskiĭ, A. V. Golubkov, and L. N. Vasil’ev, Fiz. Tverd. Tela (St. Petersburg) 44(8), 1501 (2002) [Phys. Solid State 44 (8), 1574 (2002)].
3. V. V. Kaminskiĭ, A. V. Golubkov, M. M. Kazanin, I. V. Pavlov, S. M. Solov’ev, and N. V. Sharenkova, Patent Appl. No. 2005120519/28, Russia (June 22, 2005).
4. N. V. Sharenkova, V. V. Kaminskiĭ, A. V. Golubkov, L. N. Vasil’ev, and G. A. Kamenskaya, Fiz. Tverd. Tela (St. Petersburg) 47(4), 598 (2005) [Phys. Solid State 47 (4), 622 (2005)].
5. V. V. Kaminskiĭ, N. N. Stepanov, L. N. Vasil’ev, Yu. N. Kharchenko, and I. A. Smirnov, Fiz. Tverd. Tela (Leningrad) 27(1), 177 (1985) [Sov. Phys. Solid State 27 (1), 44 (1985)].