References for the numbering systems

Col	Reference

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

R1	Claria J.J. et al. 1993, Astron. Astrophys. Suppl. 99, 1

R2	Claria J.J. 1971, Astron. J. 76,639

R3	Barrado D., Byrne P.B. 1995, Astron. Astrophys. Suppl. 111, 275

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