References for the numbering systems

Col	Reference

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R1	Piatti A.E., Claria J.J., Ahumada A.V. 2005, Publ. Astron. Soc. Pacific 117, 22

R2	Piatti A.E., Bica E., Claria J.J. 2000, Astron. Astrophys. 362, 959

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