1. “An Introduction to Probability Theory and Its Applications,”;Feller,1957
2. “An Introduction to Combinatorial Analysis,”;Riordan,1964
3. Boole, G., “Laws of Thought.” London, 1854 (reprinted by Dover, New York).
4. “The Mathematical Theory of Communication.”;Shannon,1949
5. Probabilistic logics and the synthesis of reliable organisms from unreliable components;Von Neumann,1956