References for the numbering systems

Col	Reference

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R1 Forbes D. 1981, Publ. Astron. Soc. Pacific 93,441

R2 Massey P. et al. 1995, Astrophys. J. 454, 151

R3 Deeg H.J., Ninkov Z. 1996, stron. Astrophys. Suppl. 119, 221

R4 Delgado A.J., et al. 1997, Astron. J. 113, 713

R5 Vallenari A., et al. 1999, Astron. Astrophys. 349, 825


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