References for the numbering systems

Col	Reference

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R1 Van Schewick H. 1967, Veroeff. Astr. Inst. Univ. Bonn no 76

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 Purgathofer A. 1961, Z. Astrophys. 52, 22

R5 Hoppmann J., Haidrich K. 1966, Mitt. Astr. Obs. Wien no 9, 57

R6 Bellamy F.A. 1904, Mon. Not. R. Astr. Soc. 64, 662

R7 Sudzius J., Straizys V. 1976, Bull. Vilnius Obs. 43, 3

R8 Vansevicius V., et al. 1996, Baltic Astron. 5, 539

R9 Delgado A., et al. 1998, Astron. J. 116, 1801

R10 Maciejewski G. & Niedzielski A. 2007, Astron. Astrophys. 467, 1065


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