1. Hoyle, Sir Fred: 1978,The Cosmogony of the Solar System, University College, Cardiff Press, Cardiff.
2. King, E. A.: 1976,Space Geology, Wiley, New York.
3. General arguments of cosmogony and cosmology are well explained in: Shu, F. H.: 1982,The Physical Universe, Oxford University Press.
4. Tayler, R. J.: 1976,The Origin of the Chemical Elements, Wykham Publications Limited, London.
5. For tables of the abundances of the elements see: Cameron, A. G. W.: 1982,Essays in Nuclear Astrophysics, (Eds. Barnes, Schramm, and Clayton), Cambridge University Press.