1. Kuhn, T.S. (1962) The Structure of Scientific Revolutions, Chicago, University of Chicago Press.
2. Lorenz, K. (1965) Evolution and Modification of Behaviour, Chicago, University of Chicago Press.
3. Uexküll, J.V. (1909) Umwelt und Innenleben der Tiere, Berlin.
4. Tinbergen, N. (1951) The Study of Instinct, Oxford University Press, London.
5. Pomerleau, D.A. (1990) Neural Network Based Autonomous Navigation. Vision and Navigation: The Carnegie Mellon Navlab, Kluwer Academic Publishers, 1990, Chapter 5.