1. Beer, R.D.: Intelligence as adaptive behavior: an experiment in computational neuroethology. Academic Press (1990)
2. Ben-Jacob, E., Becker, I., Shapira, Y., Levine, H.: Bacterial linguistic communication and social intelligence. Trends in Microbiology 12(8), 366–372 (2004)
3. Byrne, Whiten, A.: Machiavellian intelligence. Oxford University Press (1988)
4. Copeland, B.J.: The Modern History of Computing. In: Edward, N. (ed.) The Stanford Encyclopedia of Philosophy (fall 2008 edn.) (2008),
http://plato.stanford.edu/archives/fall2008/entries/computing-history
5. Cutland, N.: Computability, an introduction to recursive function theory. Cambridge University Press (1980)