1. Kohonen, T.: Self-organization and associative memory, (Springer-Verlag, Berlin 1988), p. 119–157
2. Vittoz, E., Heim, P., Arreguit, X., Krummenacher, F., and Sorouchyari, E.: ‘Analog VLSI implementation of a Kohonen map’, Presses Polytechniques Romandes, Journées d-electronique, 1989), p. 291–301
3. Mead, C.: Analog VLSI and neural systems, (Addison-Wesley, Reading 1989), p. 107–116, 339–351
4. Vittoz, E., and Wegmann, G.: Analogue IC design: the currentmode approach, (Peter Peregrinus Ltd., London 1990),chap. 7, p. 297–326