1. D. M. Mihalas, Stellar atmospheres (Mir, Moscow, 1982).
2. T. N. Davis, Reportson Progress in Physics 42, 1565 (1979).
3. S. R. Pottasch, Astroph. Space Sci. Library 107 (1984).
4. V. G. Gorbatskij, Cosmic gas dynamics (Nauka, Moscow, 1977).
5. Y. B. Zeldovich and Y. P. Raizer, Elements of gas-dynamics and the classical theory of shock waves (Academic Press, New York, 1966).