References

[1]  ..ܧӧܧڧ, ֧֧ڧ֧ܧѧ ֧ѧߧڧܧ, 1952..

[2]  Fang L.Z,  Sato H., Gen.Rel.Grav. 17(1985)1117.

[3]  Ap.J.,248(1981), L57-L60.

[4]  E.H.Avrett, Frontiers of Astrophysics 1976, p527

[5]  C.W.Allen, Astrophysical Quantities, 1973, 135 and 136.

[6]  E.H.Avrett, Frontiers of Astrophysics, 1976, p509.

[7]  Kenneth R.Lang, Astrophysical Formulae, 1974, Fig. 35.

[8]  A.Hewite and G.Burbidge, Ap.J.,43(1980),57-158.