1. F.M. Peza, An introduction to information theory, McGraw-Hill, 1961.
2. R.G. Gallager, Information theory and relia to comnunication, Wiley, 1968.
3. T. Berger, Rate distortion theory — A mathematical basis for data compression, Prentice-Hall, 1971.
4. D.A. Huffman, A method for the construction of minimum redundancy codes, Proc. IRE, 40, 1098, Sept. 1952.
5. G. Longo, Source coding theory, Lecture notes, CISM, Udine, 1970.