1. J.J.R. Fraústo da Silva and R.J.P. Williams, The Biological Chemistry of the Elements, Oxford University Press, Oxford, 1991. Reprinted with additions, 1996.
2. The Natural Selection of the Chemical Elements;Williams,1996
3. Bringing Chemistry to Life: From Matter to Man;Williams,1999
4. Gene Regulation;Latchman,1998
5. Genes;Lewin,1996