1. Aizu, K.: 1973, Prog. Theor. Phys.49, 1184.
2. Bailey, J., Hough, J. H., Gilmozzi, R., and Axon, D. J.: 1983, to be submitted to Mon. Not. R. Astron. Soc..
3. Barrett, P. E., and Chanmugam, G.: 1982, in Cataclysmic Variables and Related Objects, Proceedings IAU Colloquium No. 72, ed. M. Livio and G. Shaviv ( Reidel, Dordrecht ), p. 223.
4. Barrett, P. E., and Chanmugam, G.: 1973, submitted to Astrophys. J..
5. Berg, R., and Duthie, J.: 1977, Astrophys. J.211, p. 859.