Geodesic
An estimate of the code length of signals with a~finite spectrum in connection with sound-recording problems
Izvestiya. Mathematics , Tome 8 (1974) no. 4, pp. 867-894.

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In the article an estimate is given of the entropy of the Bernstein class $B_\sigma$. This class consists, by definition, of the real-valued functions of a single real variable that are bounded in absolute value on the real line by unity and such that the supports of their Fourier transforms are contained in the interval $[-\sigma,\sigma]$. The meaning of the estimates will be discussed in connection with sound-recording problems. 
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V. I. Buslaev; A. G. Vitushkin. An estimate of the code length of signals with a~finite spectrum in connection with sound-recording problems. Izvestiya. Mathematics , Tome 8 (1974) no. 4, pp. 867-894. http://geodesic.mathdoc.fr/item/IM2_1974_8_4_a4/

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[2] Levin B. Ya., Tselye funktsii, kurs lektsii, In-t mekhaniki MGU, M., 1971

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[4] Bernshtein S. N., Sobr. soch., t. 1, AN SSSR, M., 1952, str. 21