1. Barrow J. D. & Tripler F. J. 1988 Nature 331 31{34.
2. de Duve C. 1991 Blueprints for a cell. Burlington NC: Neil Patterson.
3. de Duve C. 2002 Life evolving: molecules mind and meaning. Oxford University Press.
4. de Duve C. Hoyle F. & Wickramasinghe N. C. 1991 Evolution from space. London: Dent and Sons.
5. Gould S. J. 1989 Wonderful life. London: Penguin Books.