1. V. P. Arkhipova, Perem. Zvezdy 21, 617 (1982).
2. V. P. Arkhipova, Perem. Zvezdy 22, 631 (1988).
3. V. P. Arkhipova, Pis'ma Astron. Zh. 19, 593 (1993) [Astron. Lett. 19, 235 (1993)].
4. V. P. Arkhipova, Pis'ma Astron. Zh. 20, 919 (1994) [Astron. Lett. 20, 804 (1994)].
5. V. P. Arkhipova, Pis'ma Astron. Zh. 22, 828 (1996) [Astron. Lett. 22, 743 (1996)].