1. Baldwin, E.: 1964,An Introduction to Comparative Biochemistry, Cambridge University Press, Cambridge (UK), 13–16.
2. Baltscheffsky, H., Lundin, M., Luxemburg, C., Nyrén, P., and Baltscheffsky, M.: 1986,Chem. Scr. 26B, 259–262.
3. Bernal, J. D.: 1951,The Physical Basis of Life, Routledge and Kegan Paul, London.
4. Boyer, P. D. and Bryan, D. M.: 1967,Methods Enzymol 10, 60–71.
5. Cairns-Smith, A. G.: 1982,Genetic Takeover and the Mineral Origins of Life, Cambridge University Press, London.