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3. C. Evangelisti and C. Pickover, Autocorrelation-faces, an aid to deaf children learning to speak, IBM Tech. Discl. Bul.28, 3412–3416.
4. On the educational uses of computer-generated cartoon faces;Pickover;J. Educational Technology Systems,1985
5. Short-term phase characterization in dynamic signal analysis;Martin;IBM Tech. Discl. Bul.,1985