1. V. S. Avedisova, Astron. Zh. 82, 488 (2005) [Astron. Rep. 49, 435 (2005)].
2. G. V. Beshenov and A. V. Loktin, Astron. Astrophys. Trans. 23, 103 (2004).
3. V. V. Bobylev, Pis’ma Astron. Zh. 30, 185 (2004) [Astron. Lett. 30, 159 (2004)].
4. V. V. Bobylev, Pis’ma Astron. Zh. 32, 906 (2006) [Astron. Lett. 32, 816 (2006)].
5. V. V. Bobylev, G. A. Goncharov, and A. T. Bajkova, Astron. Zh. 83, 821 (2006a) [Astron. Rep. 50, 733 (2006a)].