Col Reference--- ---------
R1 Becker W. 1965, Contr. Oss. Astr. Univ. Padova no 178
R2 Hoag A.A., et al. 1961, Publ. US Nav. Obs. 17, 347 (pe)
R3 Hoag A.A., et al. 1961, Publ. US Nav. Obs. 17, 347 (pg)
R4 Pigulski A., et al. 1997, Acta Astron. 47, 365
R5 Massey P. et al. 1995, Astrophys. J. 454, 151
R6 Paunzen E., et al. 2005, Astron. Astrophys. 443, 157
R7
R8
R9
R10
R11
R12
R13
R14 Moffat A.F.J., Vogt N. 1974, Veroeff. Astr. Inst. Univ. Bochum no 2
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