1. J.R. Koza, Genetic Programming: On the Programming of Computers by Means of Natural Selection (MIT Press, Cambridge, 1992)
2. C. Darwin, On the Origin of Species by Means of Natural Selection, 1985th edn. (John Murray, Penguin classics, London, 1859)
3. C. Darwin, Voyage of the Beagle, 1989th edn. (Henry Colburn, Penguin classics, London, 1839)
4. J.R. Koza, Genetic Programming II: Automatic Discovery of Reusable Programs (MIT Press, Cambridge, 1994)
5. J.R. Koza et al., Genetic Programming III: Darwinian Invention and Problem Solving (Morgan Kaufmann, Cambridge, 1999)