References for the numbering systems

Col	Reference

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R1 Moffat A.F.J., Vogt N. 1973, Astron. Astrophys. Suppl. 10,135

R2 Lynga G. 1964, Medd. Lunds Obs. 2 no 139

R3 Pedreros M. 1984, Thesis (Toronto)

R4 Vazquez R.A., Feinstein A. 1991, Astron. Astrophys. Suppl. 87, 383

R5 Vazquez R.A., et al. 1994, Astron. Astrophys. Suppl. 106, 339

R6 Delgado A.J. et al. 2007, Astron. Astrophys. 467, 1397


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