1. C.E.Shannon A Mathematical Theory of Communication. Bell Syst. Techn.J., 1948, 27, p. 379–423, 623–656.
2. I.Csiszár, J.Körner Information Theory. Coding Theorems for Discrete Memoryless Systems. Academiai Kiado, Budapest, 1981.
3. G.C. Clark, J.B. Cain Error-Correction Coding for Digital Communications. Plenum Press, New York and London, 1987.
4. Goppa V.D. Nonprobabilistic Mutual Information without Memory.-Probl.Control Inform.Theory, 1975, 4, p.97–102.