1. Shannon, C.E., and Weather, W.: The Mathematical Theory of Communication, (University of Illinois Press 1949)
2. Ash, R.B.: Information Theory, (John Wiley, New York 1967)
3. Abramson, N.: Information Theory and Coding, (McGraw-Hill, New York 1963)
4. Jelinek, F.: Probabilistic Information Theory, (McGraw-Hill, New York 1968)