1. Chamberlain J.W. (1961) Physics of the Aurora and Airglow, Academic Press, New York
2. Whitten R.C. and Poppoff I.G. (1971) Fundamentals of Aeronomy, John Wiley and Sons, New York
3. Ivanov-Holodnyi G.S. and Nikolsky G.M. (1969) Sun and Ionosphere, Nauka, Moscow, (in Russian)
4. Danilov A.D. and Vlasov M.N. (1973) Photochemistry of Ionized and Excited Particles in the Low Ionosphere, Gidrometeoizdat, Leningrad (in Russian)
5. Omholt A. (1971) The Optical Aurora, Springer, Berl in Heidelberg