1. Anand, S.P.S.: 1968,Astrophys. J. 153, 135.
2. Chandrasekhar, S.: 1933,Monthly Notices Roy. Astron. Soc. 93, 930.
3. Chandrasekhar, S.: 1939,An Introduction to the Study of Stellar Structure. Dover Publications, New York, chapter XI, p. 427.
4. Greenstein, J.L., andTrimble, V.L.: 1967,Astrophys. J. 149, 283.
5. James, R. A.: 1964,Astrophys. J. 140, 552.