1. Minsky, M., Papert, S.: Perceptrons. An introduction to computational geometry. Cambridge: MIT press 1969
2. Rosenblatt, F.: Principles of neurodynamics. New York: Spartan Books 1962
3. Sherrington, D., Kirkpatrick, S.: Phys. Rev. Lett.47, 361 (1975)
4. Kraut, W., Mezard, M.: J. Phys. (Paris)50, 3054 (1989)
5. Kraut, W., Opper, M.: J. Phys. A22, L519 (1989)