Col Reference--- ---------
R1 Hertzsprung E. 1947, Ann. Sterrew. Leiden 19,3 (HII)
R2 Hertzsprung E. 1923, Mem. Danish Acad. no 4
R3 Gaultier E.Ch. 1901, Bull. Soc. Astr. France 14, 441
R4 Graff K. 1920, Hamburg Astr. Abh. 1 no 3
R5 Trumpler R.J. 1921, Lick Obs. Bull. 10, 110
R6 Flare stars unified numbering
R7 Haro G., et al. 1982, Bol. Inst. Tonantzintla 3, 3 (HCG)
R8 Hambly N.C. et al. 1993, Astron. Astrophys. Suppl. 100, 607 (HHJ)
R9 Stauffer J., Klemola A., Prosser C. 1991, Astron. J. 101, 980 (SK)
R10 Belikov A.N., et al. 1998, Astron. Astrophys. 332, 575
R11 Pinfield D.J., et al. 2000, Mon. Not. R. Astron. Soc. 313, 347
R12 Deacon N.R., Hambly N.C. 2004, Astron. Astrophys. 416, 125
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