1. The Ecogen 66 sacrificed for the Greenpeace 28;Nat. Biotechnol.,2000
2. H.R.H. Prince Charles (2000) Respect for the Earth, Lecture 6 BBC Reith Lectures 2000
3. Economic and Social Research Council (1999) The politics of GM food: Risk, science & public trust.
4. Letter to Dr Asa Grey 5 September;Darwin,1857
5. Light and life;Bohr;Nature,1933