1. Attneave, F.: Informational aspects of visual perception. Psychol. Rev. 61, 183?193 (1954)
2. Barlow, H.B.: Trigger features, adaption and economy of impulses. In: Information Processing in the Nervous system, K. N. Leibovic, ed.: Berlin, Heidelberg, New York: Springer (1969)
3. Barlow, H.B., Narasimhan, R., Rosenfeld, A: Visual pattern analysis in machines and animals. Science 117, 567?575 (1972)
4. Barlow, H.B.: Sensory mechanisms, the reduction of redundancy and intelligence. Symposium on the mechanization of thought processes at the National Physical Laboratory, London. H. M. Stationary Office, Symp. No. 10, 535?539 (1959)
5. Bishop, P.O., Levik, W.R., Williams, W.O.: Statistical analysis of dark discharge of lateral geniculate neurons. J. Physiol. (London) 170, 598?612 (1964)