1. V. V. Orlov and A. V. Petrova, Pis’ma Astron. Zh. 26, 301 (2000) [Astron. Lett. 26, 250 (2000)].
2. V. V. Orlov and R. Ya. Zhuchkov, Astron. Zh. 82, 231 (2005) [Astron. Rep. 49, 201 (2005)].
3. R. Ya. Zhuchkov and V. V. Orlov, Astron. Zh. 82, 308 (2005) [Astron. Rep. 49, 274 (2005)].
4. Y. Kozai, Astron. J. 67, 591 (1962).
5. E. B. Ford, B. Kozinsky, and F. A. Rasio, Astrophys. J. 535, 385 (2000).