References for the numbering systems

Col	Reference

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

R1	Ahumada J.A. 2003, Rev. Mex. Astron. Astrofis. 39, 41

R2	Ramsay G., Pollaco D.L. 1992, Astron. Astrophys. Suppl. 94, 73

R3	Paunzen E., Maitzen H.M. 2001, Astron. Astrophys. 373, 153

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