1. Allen, C. W.: 1973,Astrophysical Quantities (3rd ed.), The Athlone Press, London.
2. Corona, M. G.: 1985, ?Hydrodynamical Approach of Galaxy Formation on the Basis of a Fluid Model of Two and Three Components?, Konstanzer Dissertation.
3. Kholodny, I., Nikolshii, G. M., and Gulyaev, R. A.: 1965,Soviet Astron. 4, 754.
4. Landau, L. D. and Lifshitz, E. M.: 1979,Statistische Physik, Teil. 1, Akademie-Verlag, Berlin.
5. Mitchner, M. and Kruger, Ch. H.: 1973,Partially Ionized Gases, John Wiley & Sons, New York.