1. G. A. Vardapetyan, "Characteristics of reaction of neurons of auditory cortex of the cat," in: Mechanisms of Hearing [in Russian], Nauka, Leningrad (1967), pp. 74?90.
2. G. V. Gershuni, "Organization of afferent flow and process of differentiation of signals of different durations," Zhurn. Vyssh. Nervn. Deyat.,15, 260?273 (1965).
3. Ya. Katsuki, "Neural mechanisms of auditory sensations in the cat," in: Theory of Communication in Sensory Systems [Russian translation], Mir, Moscow (1964), pp. 288?306.
4. M. N. Livanov, "Inhibition in neuronal systems of the cerebral cortex," in: Reflexes of the Brain [in Russian], Moscow (1965), pp. 64?72.
5. H. A. Beagley and J. J. Knight, "Changes in auditory evoked response with intensity," J. Laryng. and Otology,81, 861?873 (1967).