1. S. A. Otero, P. Wils, G. Hoogeveen, and P. A. Dubovsky, Information Bulletin on Variable Stars 5681, 1 (2006).
2. N. N. Samus’, E. V. Kazarovets, O. V. Durlevich, et al., Astronomy Reports 61, 80 (2017).
3. L. Lindegren, J. Hernández, A. Bombrun, et al., Astron. and Astrophys. 616, A2 (2018).
4. M. Wenger, F. Ochsenbein, D. Egret, et al., Astron. and Astrophys. 143, 9 (2000).
5. N. E. Kurochkin, Astronomicheskij Tsirkulyar 1131, 7 (1980).