1. Abramowitz, M. and Stegun, I. A. (Eds.): 1984, Handbook of Mathematical Functions, Verlag Harri Deutsch, ThunFrankfurt/Main, pp. 56?75.
2. Anders, E.: 1972, Physico-Chemical Processes in the Solar Nebula as Inferred from Meteorites, in H. Reeves (Ed.), On the Origin of the Solar System, Centre National de la Recherche Scientifique, Paris, pp. 179?202.
3. Anderson, D. L.: 1972, Internal Constitution of Mars, J. Geophys. Res. 77, 789?795.
4. Anderson, D. L. and Sammis, C.: 1970, Partial Melting in the Upper Mantle, Phys. Earth Planet. Inter. 3, 41?50.
5. Arvidson, R. E., Goettel, K. A., and Hohenberg, C. M.: 1980, A Post-Viking View of Martian Geologic Evolution, Rev. Geophys. Space Phys. 18, 565?603.