References for the numbering systems

Col	Reference

---	---------

R1	Galadi-Enriquez D., et al. 1998, Astron. Astrophys. 333, 471

R2	Galadi-Enriquez D., et al. 1998, Astron. Astrophys. Suppl. 131, 239

R3	Cuffey J. 1937, Ann. Harvard Coll. Obs 105, 403

R4	Straizys V., et al. 1992, Baltic Astron. 1, 125

R5	Li H. 1954, Ann. Zo-Se Obs. 23

R6	Tian K.P., et al. 1998, Astron.Astrophys. Suppl. 131, 89

R7	Straizys V., et al. 2003, Baltic Astron. 12, 323

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