1. Ackerman, M.: 1971, in G. Fiocco (ed.), Mesospheric Models and Related Experiments, D. Reidel Publ. Co., Dordrecht, Holland, p. 149.
2. Ackerman, M., Biaumé, F., and Kockarts, G.: 1970, Planetary Space Sci. 18, 1639.
3. Banks, P. M.: 1977, J. Atmospheric Terrest. Phys. 39, 179.
4. Banks, P. M. and Kockarts, G.: 1973a, Aeronomy, Part A, Academic Press, New York.
5. Banks, P. M. and Kockarts, G.: 1973b, Aeronomy, Part B, Academic Press, New York.