1. V. Braitenberg. VEHICLES, Experiments in synthetic psychology. MIT-Press, Cambridge, Massachusetts, 1984.
2. M. L. Burger. Zum mechanismus der gegenwendung nach mechanisch aufgezwungener richtungsänderung bei schizophyllum sabulosum (julidae, diplopoda). Z. verg. Physiologie, 71:219–254, 1971.
3. C. K. Hemelrijk and D. Lambrinos. Performance of two homing strategies in environments with differently distributed obstacles. In P. Gaussier and J. D. Nicoud, editors, From Perception to Action, Lausanne, 1994. IEEE Computer Society Press.
4. Teuvo Kohonen. Self-Organization and Associative Memory. Springer Series in Information Sciences. Springer Verlag, 3rd edition, 1989.
5. Bredan McGonigle and Ulrich Nehmzow. Robot navigation by light. In J. A. Mayer and S. W. Wilson, editors, From animals to animats, Cambridge, 1990. MIT Press.