1. Allen, C. W.: 1973,Astrophysical Quantities (3rd ed.), University of London, The Athlone Press, London.
2. Babcock, M. W.: 1963,Astrophys. J. 137, 690.
3. Burdyuzha, V. V. and Zhilinskii, B. I.: 1976, Preprint IKI-284.
4. Dolginov, A. Z., Gnedin, Yu. N., and Silantjev, N. A.: 1979,Rasprostraneije i polyarizatsija izluchenija v kosmicheskoi srede, Nauka, Moscow.
5. Höflich, P. and Wehrse, R.: 1987,Astron. Astrophys. 185, 107.