Col Reference--- ---------
R1 Vasilevskis S., Rach R.A. 1957, Astron. J. 62, 175
R2 Larsson-Leander G. 1960, Stockholms Obs. Ann. 20 no 9
R3 Hoag A.A., et al. 1961, Publ. US. Nav. Obs. 17, 347 (pe)
R4 Hoag A.A., et al. 1961, Publ. US. Nav. Obs. 17, 347 (pg)
R5 Ancien no sequentiel remplace par ni LL+1000
R6 Stetson P.B. 2000, Publ. astron. Soc.Pacific 112, 925
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