1. L. N. Berdnikov, Pis’ma Astron. Zh. 18, 519 (1992) [Sov. Astron. Lett. 18, 207 (1992)].
2. L. N. Berdnikov, Pis’ma Astron. Zh. 20, 285 (1994) [Astron. Lett. 20, 232 (1994)].
3. L. N. Berdnikov, V. V. Ignatova, and Yu. A. Fadeyev, in B. V. Kukarkin: Variable Stars is a Key to Understanding the Structure and Evolution of the Galaxy, (Ed. by N. N. Samus’ and A. V. Mironov (CYGNUS, Nizhnii Arkhyz, 2000), p. 18 [in Russian].
4. L. N. Berdnikov, A. Yu. Knyazev, V. V. Kravtsov, et al., Pis’ma Astron. Zh. 35, 33 (2009a) [Astron. Lett. 35, 39 (2009a)].
5. L. N. Berdnikov, E. N. Pastukhova, D. G. Turner, et al., Pis’ma Astron. Zh. 35, 199 (2009b) [Astron. Lett. 35, 175 (2009b)].