1. Gallager R. G.: Information Theory and Reliable Communication ( Wiley, New York 1968 )
2. Ash, R. B.: Information Theory ( Interscience, New York 1965 )
3. Berger, T.: Rate Distortion Theory: A Mathematical Basis for Data Compression ( Prentice Hall, Englewood Cliffs 1971 )
4. Elias, P.: List Decoding for Noisy Channels (M.I.T. Research Lab. of Electronics, Tech. Report 335, 1957 )
5. Shannon, C. E., Gallager, R. G., Berlekemp, E. R.: Inform, and Control 10, 65; 10, 522 (1967)