1. Aleksander, I., Proc. of Spring Joint Computer Conf., pp. 707-712 (1967).
2. Decision-Making Processes in Pattern Recognition;Sebestyen,1962
3. Threshold Logic;Lewis,1967
4. What the Frog's Eye Tells the Frog's Brain;Lettvin;Proc. IRE,1959
5. Functional Electronic Model of the Frog Retina;Herscher;Trans. IEEE,1963