1. Shannon, C. E., “A mathematical theory of communication,”Bell System Tech. Jour., Vol. 27 (1948).
2. Wiener, N.,Cybernetics, John Wiley & Sons, New York, 1948.
3. Shannon, C. E., and Weaver, W.,The Mathematical Theory of Communication, Univ. of Illinois Press, Urbana, 1949.
4. Khinchin, A. I., “The entropy concept in probability theory,”Uspekhi Matematicheskikh Nauk, Vol. 8 (1955), (in Russian).
5. Hatori, H., “A note on the entropy of a continuous distribution,”Kodai Math. Sem. Rep. Vol. 10 (1958).