References for the numbering systems

Col	Reference

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

R1 Sanner J., et al. 2001, Astron. Astrophys. 369, 511

R2 Moffat A.F.J., Vogt N. 1973, Astron. Astrophys. Suppl. 10,135

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

R4 McSwain M.V., Gies D.R., 2005, ApJS 161, 118


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