References for the numbering systems

Col	Reference

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

R1	Cuffey J. 1938, Harvard Coll. Obs. Ann. 106, 39

R2	Purgathofer A. 1964, Ann. Univ. Sternw. Wien 26 no 2

R3	Harris G.L.H., Harris W.E. 1977, Astron. J. 82, 612

R4	Li-Hen 1954, Ann. Obs. Zo-Se  vol XXIII

R5	Tian K.P. et al. 1983, Annals Shanghai Obs. 5, 227

R6	Balaguer-Nunez L., et al. 1998, Astron. Astrophys. Suppl. 133, 387

R7	Mermilliod J.-C., et al. 2003, Astron. Astrophys. 399, 105

R8	Balaguer-Nunez L., et al. 2004, Astron. Astrophys. 426, 827

R9	Celeste Parisi M., et al. 2005, Mon. Not. R. Astron. Soc. 363, 1247

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