References for the numbering systems

Col	Reference

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

R1	Aveni A.F., Hunter J.H. 1972, Astron. J. 77, 17

R2	Shevchenko V.S., Yakubov S.D. 1989, Sov. Astron. 33, 370

R3	Magakian T.Yu., et al. 2004, Astrophysics 47, 519 (table 3)

R4	Magakian T.Yu., et al. 2004, Astrophysics 47, 519 (table 2)

Back to the form