References for the numbering systems

Col	Reference

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

R1 Phelps R.L., Janes K.A. 1994, Astrophys. J. Suppl. 90, 31

R2 Hardorp J. 1960, Astr. Abh. Hamburg Sternw. Bergedorf V no 7

R3 Jasevicius J. 1964, Astr. Obs. Bull. Vilnius 13, 1

R4 Subramaniam A., et al. 2005, Astron. Astrophys. 440, 511

R5 Maciejewski G. & Niedzielski A. 2007, Astron. Astrophys. 467, 1065


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