References for the numbering systems

Col	Reference

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R1 Wesselink A.J. 1969, Mon. Not. R. Astr. Soc. 146,329

R2 Becker W., et al. 1976, Basle Catalogue ...

R3 King D.S. 1979, Sydney Obs. Papers no 83

R4 Sagar R., Cannon R.D. 1997, Astron. Astrophys. Suppl. 122, 9

R5 Sanner J., et al. 2001, Astron. Astrophys. 369, 511

R6 McSwain M.V., Gies D.R., 2005, ApJS 161, 118

R7 Delgado A.J. et al. 2007, Astron. Astrophys. 467, 1397


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